Please select the eligibility criteria that correspond to the clinical trial below.
Title: Prospective, Randomized, Placebo-controlled, Double-blind, Multicenter, Parallel Group Study to Assess the Efficacy, Safety and Tolerability of Bosentan in Patients With Inoperable Chronic Thromboembolic Pulmonary Hypertension (CTEPH)
Brief Summary: The present trial investigates a possible use of oral bosentan, which is currently approved for the treatment of symptoms of pulmonary arterial hypertension (PAH), to patients suffering from inoperable chronic thromboembolic pulmonary hypertension (CTEPH) because of (i) peripheral localization of thrombotic material or (ii) persistent or recurrent pulmonary hypertension after pulmonary endarterectomy.


Options:
A: Inclusion Criteria:

* Diagnosis of PAH of either primary (idiopathic), familial or secondary to systemic sclerosis (excluding those with marked pulmonary fibrosis) according to World Conference on Pulmonary Hypertension classification (Venice, 2003).
* Symptoms with a WHO class of II-IV

Exclusion Criteria:

* Use of unspecific phosphodiesterase inhibitors (for example, pentoxyfillin, enoximon, milrinone or pimobendan) during the study
* Chronic inhaled nitric oxide therapy from start to study completion
* Treatment with catecholamines (for example, adrenalin, noradrenalin, dopamine),
* Pre-existing lung diseases, including parasitic diseases affecting lungs, asthma, congenital abnormalities of the lungs, chest, and diaphragm.
* Pulmonary artery or valve stenosis; pulmonary venous hypertension; chronic thromboembolic pulmonary hypertension
* Acute heart failure or chronic left sided heart failure; congenital or acquired valvular or myocardial disease
* Severe (systemic) arterial hypertension (\> 200 mmHg (systolic) or \> 120 mmHg (diastolic)) Other protocol-defined inclusion/exclusion criteria may apply
B: Inclusion Criteria:

* Signed informed consent prior to any study-mandated procedure
* No contra-indication to stop (according to label) anti-hypertensive treatment(s) at screening
* Mild-to-moderate essential hypertension with or without ongoing anti-hypertensive treatment(s):

  -- Mean (of 5 measurements) sitting diastolic blood pressure (SiDBP) ≥ 90 to \< 110 mmHg measured by office blood pressure measurements (OBPM).
* Women of childbearing potential must have a negative pregnancy test and use of reliable methods of contraception

Exclusion Criteria:

* Severe hypertension (grade 3): mean sitting systolic/diastolic BP (SiSBP/SiDBP; measured by OBPM) ≥ 180/110 mmHg, respectively.
* Secondary hypertension
* Known hypertensive retinopathy greater than Keith-Wagener Grade 2
* Myocardial infarction, percutaneous transluminal coronary angioplasty, or coronary artery bypass graft within 12 months prior to randomization
* Unstable angina within 6 months prior to randomization
* Heart failure New York Heart Association class III and IV
* Valvular defects (such as severe aortic or mitral valve disease) and/or hemodynamically relevant rhythm disturbances
* Clinical evidence of cerebrovascular insufficiency or a cerebrovascular accident within 6 months prior to randomization.
* Subjects working night shifts
* Body mass index \< 20 kg/m2 or \> 40 kg/m2
* Treatment with any medication which may affect BP (e.g., treatment of psychiatric diseases, ophthalmic preparations)
* Treatment with strong cytochrome P450 3A4 (CYP3A4) isoenzyme inhibitors or inducers
* Treatment with guanethidine and/or mineralocorticoid receptor antagonists within 1 month prior to Screening (Visit 1)
* Treatment with another investigational treatment within 1 month prior to Screening (Visit 1)
* Any circumstances or conditions, which, in the opinion of the investigator, may affect full participation in the study or compliance with the protocol
C: Inclusion Criteria:

* Symptomatic pulmonary hypertension in modified NYHA functional class II to IV due to CTEPH as demonstrated by ventilation/perfusion lung scanning and pulmonary angiography.
* CTEPH judged inoperable because of peripheral localization of thrombotic material or persistent or recurrent pulmonary hypertension after pulmonary endarterectomy (PEA) with no evidence of recurrent thromboembolism and not amenable to repeated surgery.
* 6-minute walk test (6MWT) distance \< 450 m.
* Hemodynamic evaluation showing: Mean pulmonary arterial pressure (mPAP) \>= 25 mmHg; Pulmonary capillary wedge pressure (PCWP) \< 15 mmHg; Pulmonary vascular resistance (PVR) at rest \>= 300 dyn×sec/cm5
* For patients who underwent PEA, hemodynamic evaluation must have been performed more than 6 months after PEA.
* For all patients, hemodynamic evaluation must have been performed with the 3 months immediately preceding inclusion.
* Men or women \>= 18 and =\< 80 years of age (Women of childbearing potential must have a negative pre-treatment pregnancy test and use a reliable method of contraception).
* Anticoagulants at efficacious dose for at least 3 months prior to randomization.
* Signed informed consent prior to initiation of any study-mandated procedure.

Exclusion Criteria:

* Other forms of pulmonary hypertension including pulmonary hypertension related to sickle cell disease.
* Obstructive lung disease: FEV1/FVC \< 0.5 after bronchodilator.
* Severe restrictive lung disease: Total Lung Capacity \< 60% of predicted value.
* Acute or chronic impairment (other than dyspnea), limiting the ability to comply with study requirements (in particular with 6MWT), e.g., angina pectoris, intermittent claudication.
* Symptomatic pulmonary embolism within 6 months prior to randomization.
* Pulmonary endarterectomy within 6 months prior to randomization.
* Psychotic, addictive or other disorder limiting the ability to provide informed consent or to comply with study requirements.
* Illness with a life expectancy of less than 6 months.
* Moderate to severe hepatic impairment, i.e., Child-Pugh Class B or C.
* AST and/or ALT \> 3 times the upper limit of normal ranges.· Hemoglobin concentration \< 75% the lower limit of normal ranges.
* Pregnancy or breast-feeding.
* Systolic blood pressure (BP) \< 85 mmHg.
* Treatment or planned treatment with another investigational drug and/or pulmonary angioplasty within 3 months prior to randomization.
* Treatment with an endothelin receptor antagonist, a phosphodiesterase inhibitor, L-arginine or with prostanoids (excluding acute administration during a catheterization procedure to test vascular reactivity) within 3 months prior to randomization.
* Treatment for pulmonary hypertension within 1 month prior to randomization, excluding calcium channel blockers if present for at least 1 month before randomization.
* Treatment with calcineurin-inhibitors (e.g., cyclosporine A and tacrolimus), sirolimus, fluconazole, glibenclamide (glyburide) within 1 week prior to randomization.
* Known hypersensitivity to bosentan or any of the excipients.
D: Inclusion Criteria:

* Between 18 and 60 years of age inclusive, at the time of signing the informed consent.
* Healthy as determined by a responsible and experienced physician, based on a medical evaluation including medical history, physical examination, laboratory tests, vital signs and cardiac monitoring (ECG and 24 hour Holter). A subject with a clinical abnormality or laboratory parameter(s) which is/are not specifically listed in the inclusion or exclusion criteria, outside the reference range for the population being studied may be included only if the Investigator, in consultation with Medical Monitor if required, judges and documents that the finding is unlikely to introduce additional risk factors and will not interfere with the study procedures.
* Body weight \>= 50 Kilogram (kg) (110 pounds \[lbs\]) for men and \>= 45 kg (99lbs) for women and body mass index (BMI) within the range 18 - 30 kg per square metre (m\^2) (inclusive)
* Male or Female. Female with non-reproductive potential defined as, Pre-menopausal females with one of the following: Documented tubal ligation or Documented hysteroscopic tubal occlusion procedure with follow-up confirmation of bilateral tubal occlusion or Hysterectomy or Documented Bilateral Oophorectomy, Documented Postmenopausal defined as 12 months of spontaneous amenorrhea
* Capable of giving signed informed consent.

Exclusion Criteria:

* A blood pressure \<100/55 millimetre of Mercury (mm Hg).
* Haemoglobin (Hb) below normal range: Hb \<133 (gram per litre) g/L for males and Hb \<114 g/L for females
* Alanine amino transferase (ALT) and bilirubin \>1.5 x upper limit of normal (ULN) (isolated bilirubin \>1.5xULN is acceptable if bilirubin is fractionated and direct bilirubin is \<35 percentage \[%\]).
* Current or chronic history of liver disease, or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones)
* Corrected QT (QTc) \>450 milliseconds (msec). The QTc is the QT interval corrected for heart rate according to Bazett's formula (QTcB), Fridericia's formula (QTcF), and/or another method, machine-read or manually over-read.
* Use of prescription or non-prescription drugs, including vitamins, herbal and dietary supplements (including St John's Wort) within 7 days (or 14 days if the drug is a potential enzyme inducer) or 5 half-lives (whichever is longer) prior to the first dose of study medication, unless in the opinion of the Investigator and Medical Monitor the medication will not interfere with the study procedures or compromise subject safety.
* History of regular alcohol consumption within 6 months of the study defined as: An average weekly intake of \>21 units for males or \>14 units for females. One unit is equivalent to 8 gram (g) of alcohol: a half-pint (\~240 millilitre \[mL\]) of beer, 1 glass (125 mL) of wine or 1 (25 mL) measure of spirits.
* Smoking more than 5 cigarettes per week and subjects must be able to abstain from smoking for a 24 hour period prior to dose and any time whilst in the clinical unit.
* History of sensitivity to any of the study medications, or components thereof or a history of drug or other allergy that, in the opinion of the Investigator or Medical Monitor, contraindicates their participation.
* Presence of hepatitis B surface antigen (HBsAg), positive hepatitis C antibody test result at Screening or within 3 months prior to first dose of study treatment.
* A positive test for human immuno-deficiency virus (HIV) antibody
* A positive pre-study drug/alcohol screen.
* Where participation in the study would result in donation of blood or blood products in excess of 500 mL within previous 3 months
* The subject has participated in a clinical trial and has received an investigational product within the following time period prior to the first dosing day in the current study: 3 months, 5 half-lives or twice the duration of the biological effect of the investigational product (whichever is longer).
* Exposure to more than four new chemical entities within 12 months prior to the first dosing day.

Answer: C