Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Randomized, Double-blind, Multi-center Comparison of the Efficacy and Safety of Certoparin (3000 U Anti-Xa o.d.) With Unfractionated Heparin (5000 IU t.i.d.) in the Prophylaxis of Thromboembolic Events in Acutely Ill Medical Patients
Brief Summary: This study is designed to provide efficacy and safety data for certoparin in the prophylaxis of venous thromboembolism in immobilized, acutely ill medical patients.


Options:
A: Inclusion Criteria:

* cancer patients with a first diagnosis of unsuspected PE

Exclusion Criteria:

1. age \<18 years;
2. ongoing anticoagulant therapy for previous VTE or indications for long-term anticoagulation other than deep vein thrombosis (DVT) or PE;
3. life expectancy less than 3 months.
B: Inclusion Criteria:

1. Histologically or cytologically verified SCLC, all stages
2. WHO performance status 0, 1, 2 or 3
3. Age 18 years or older
4. Intention and feasibility to treat with chemotherapy consisting of platinum + topoisomerase inhibitor.
5. Platelets \>100 x109 /L
6. Signed informed consent
7. PK (prothrombin complex) INR and APTT within normal ranges.

Exclusion Criteria:

1. Prior systemic chemotherapy for lung cancer.
2. Concomitant anticoagulation treatment, except for ASA or clopidogrel
3. Active overt bleeding of clinical importance or at high risk (e.g. earlier observed haemorrhage in a brain metastasis, severe coagulopathy as haemophilia, severe liver dysfunction with impaired coagulation, acute peptic ulcer, and within the last 3 months suffered from intracranial haemorrhage, or surgery in the central nervous system).
4. Any other known contraindication for enoxaparine ( e.g. Hypersensitivity against enoxaparine and its derivatives).
5. Pregnancy or breast-feeding
6. Fertile women not using effective contraceptives or men who do not agree to use effective contraception during the treatment period.
7. Treatment with any other investigational agent, or participation in any other clinical trial.
C: Inclusion Criteria:

1. Hospitalized medical patients 70 years of age or older
2. Acute medical illness with significant decrease in mobility expected for at least 4 days (patient bedridden or only able to walk short distances)
3. written informed consent

Exclusion Criteria:

1. immobilization longer than 3 days prior to randomization
2. prior major surgery, trauma or invasive procedure within the last 4 weeks including any injuries or operation of central nervous system
3. expected major surgical or invasive procedure within the next 3 weeks after randomization
4. LMWH/heparin administration longer than 48 hours in the 5 days prior to randomization
5. immobilization due to cast or fracture
6. indication for anticoagulatory or thrombolytic therapy
7. acute symptomatic DVT / PE
8. known hypersensitivity to any of the study drugs or drugs with similar chemical structures
9. Acute or history of heparin induced thrombocytopenia type II (HIT II)

Other protocol-defined inclusion/exclusion criteria may apply
D: INCLUSION CRITERIA:

* both sexes;aged\>18 years;
* suffering from different types of malignancies(lung, breast,gastric,colon- rectum,pancreatic,ovarian,head and neck cancer)undergoing systemic chemotherapy,
* having signed Informed Consent prior to initiation of any study procedure.

EXCLUSION CRITERIA:

* adjuvant and neo-adjuvant chemotherapy;
* objectively confirmed venous or arterial thromboembolism in the last three months;
* antithrombotic treatment for other indications;
* life expectancy of less than 3 months;
* Performance Status\>2(ECOG);
* active bleeding or bleedings in the last four weeks requiring hospitalization,transfusion or surgical intervention;
* bleeding diathesis(prothrombin time\<70% or activated partial thromboplastin time ratio\>1.3),or platelet count\<50x10\^9/L;
* cerebrovascular hemorrhage in the last six months;
* known active gastric or duodenal ulcer;
* known cerebral metastasis;
* cerebral aneurysm;
* III-IV grade diabetic retinopathy;
* severe and uncontrolled hypertension(systolic blood pressure\>180 mmHg or diastolic blood pressure\>110 mmHg);
* chronic atrial fibrillation;
* acute endocarditis;
* acute pancreatitis;
* known hypersensitivity to unfractionated heparin or LMWH;
* previous occurrence of heparin-induced thrombocytopenia;
* renal impairment (dependent on dialysis or creatinine higher than 2.5mg%);
* liver insufficiency (alanine aminotransferase,aspartate aminotransferase,alkaline phosphatase levels\>3 times the upper limit of the normal ranges and/or total bilirubin \>3.0 mg/ml);
* pregnancy or childbearing potential without adequate contraception;
* treatment with other investigational drugs or patient inclusion in other clinical trials;
* patients who are unable to fulfill the study requirements in terms of visits/compliance to treatment.

Answer: C