Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Phase 3, Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study to Evaluate the Efficacy and Safety of VX-661 in Combination With Ivacaftor in Subjects Aged 12 Years and Older With Cystic Fibrosis, Heterozygous for the F508del-CFTR Mutation and With a Second CFTR Mutation That Is Not Likely to Respond to VX-661 and/or Ivacaftor Therapy (F508del/NR)
Brief Summary: Study to evaluate the efficacy of VX-661 in combination with ivacaftor (IVA, VX-770) through Week 12 in participants with cystic fibrosis (CF) who are heterozygous for the F508del mutation on the CF transmembrane conductance regulator (CFTR) gene and with a second CFTR mutation that is not likely to respond to VX-661 and/or IVA therapy (F508del/not responsive \[NR\]).


Options:
A: Inclusion Criteria:

* Confirmed diagnosis of CF defined as a sweat chloride value greater than or equal to (\>=)60 millimole per liter (mmol/L) by quantitative pilocarpine iontophoresis.
* Heterozygous for the F508del-CFTR mutation and with a second CFTR mutation that is not likely to respond to VX-661 and/or ivacaftor therapy, genotype to be confirmed via assessment at the Screening Visit.
* Forced Expiratory Volume in 1 Second (FEV1) \>=40 percent (%) and less than or equal to (\<=)90% of predicted normal for age, sex, and height at Screening Visit.

Exclusion Criteria:

* History of any comorbidity that, in the opinion of the investigator, might confound the results of the study or pose an additional risk in administering study drug to the participant.
* An acute upper or lower respiratory infection, pulmonary exacerbation, or changes in therapy (including antibiotics) for pulmonary disease within 28 days before Day 1 (first dose of study drug).
* History of solid organ or hematological transplantation.
* Ongoing or prior participation in an investigational drug study or use of commercially available CFTR modulator within 30 days of screening.
* Pregnant or nursing females.
B: Inclusion Criteria:

* Subject voluntarily agrees to participate in this study; signs an IRB-approved informed consent
* Subject is healthy as determined by the screening medical evaluation (including but not limited to medical history, physical examination and clinical laboratory evaluations)
* Subject is Caucasian
* Female subject must be of non-childbearing potential or post-menopausal
* Male subject must agree to use a condom with spermicide and refrain from sperm donation from Day -1 until 30 days post last dose or have a vasectomy at least 6 months prior to screening
* Subject is a non-smoker
* Subject has a body weight \> 45 kg and BMI between 18 and 32 kg/m2
* Subject has no clinically significant vital signs finding at screening or Day -1, per the investigator's judgment
* Subject has no clinically significant abnormal findings in 12-lead ECG , per the investigator's judgment, at screening

Exclusion Criteria:

* Subject has clinically significant history or evidence of cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrine, neurological, immunological, or psychiatric disorder(s)
* Subject has abnormal 12-lead ECG at screening per protocol
* Subject has any disorder that would interfere with the absorption, distribution, metabolism or excretion of drugs
* Subject has any concurrent disease or condition that, in the opinion of the investigator, would make the subject unsuitable for participation in the clinical study
* Subject is a current alcohol abuser and/or has a history of illicit drug abuse within 1 year prior to dosing
* Subject has a positive screening test for Hepatitis B surface antigen, Hepatitis C antibody, or human immunodeficiency virus (HIV) antibody
* Subject is unwilling to refrain from consumption of coffee and caffeine-containing foods and beverages from Day -1 until discharge on Day 14
* Subject is unwilling to abstain from using alcohol beverages from Day -1 until discharge on Day 14
* Subject has donated blood (\> 500 mL) or blood products within 56 days prior to Day -1
* Subject has used over-the-counter (OTC) medications (including vitamins) from Day -7, or prescription medications, or herbal remedies from Day -14 until end-of-study follow-up call. By exception, acetaminophen ≤ 1000 mg/day is permitted except within 48 hours prior to Day -1 and hormone replacement therapy (HRT) is allowed throughout the study
* Subject has used an investigational drug within 30 days prior to Day 1 dosing
* Subject has a history of bleeding disorders
C: Inclusion Criteria:

1. Male or female subject ≥ 18 years of age, on the day of signing the Informed Consent Form (ICF).
2. A confirmed clinical diagnosis of CF.
3. One F508del mutation on one allele in the CFTR gene, a gating (class III) mutation (one of the following: G551D, G1244E, G1349D, G178R, G551S, S1251N, S1255P, S549N, or S549R) on the 2nd allele in the CFTR gene (documented in the subject's medical record or CF registry).
4. Weight ≥ 40 kg.
5. Stable concomitant treatment for at least 4 weeks (28 days) prior to baseline (including physician prescribed ivacaftor (Kalydeco®) 150 mg b.i.d.).
6. Forced expiratory volume in 1 second (FEV1) ≥ 40% of predicted normal for age, gender and height at screening (pre- or postbronchodilator).

Exclusion Criteria:

1. History of clinically meaningful unstable or uncontrolled chronic disease that makes the subject unsuitable for inclusion in the study in the opinion of the investigator.
2. Unstable pulmonary status or respiratory tract infection (including rhinosinusitis) requiring a change in therapy within 4 weeks of baseline.
3. Need for supplemental oxygen during the day, and \>2 liters per minute (LPM) while sleeping.
4. History of hepatic cirrhosis with portal hypertension (e.g., signs/symptoms of splenomegaly, esophageal varices, etc).
5. Abnormal liver function test at screening; defined as aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT) and/or alkaline phosphatase and/or total bilirubin (\>1.5 times ULN (CTCAE Grade 2) and/or gamma-glutamyl transferase (GGT) ≥ 3x the upper limit of normal (ULN), and/or total bilirubin (\>1.5 times ULN (CTCAE Grade 2).
6. Estimated creatinine clearance \< 60mL/min using the Cockroft-Gault formula at screening.
D: Inclusion Criteria:

* Homozygous for the F508del CFTR mutation, genotype to be confirmed at the Screening Visit
* Confirmed diagnosis of CF defined as a sweat chloride value ≥60 mmol/L by quantitative pilocarpine iontophoresis
* Forced expiratory volume at one second (FEV1) ≥40% and ≤90% of predicted normal for age, sex, and height during screening
* Stable CF disease as judged by the investigator
* Willing to remain on a stable CF medication regimen through Week 24 or, if applicable, the Safety Follow up Visit

Exclusion Criteria:

* History of any comorbidity that, in the opinion of the investigator, might confound the results of the study or pose an additional risk in administering study drug to the participant.
* An acute upper or lower respiratory infection, pulmonary exacerbation, or changes in therapy (including antibiotics) for pulmonary disease within 28 days before Day 1 (first dose of study drug)
* Pregnant or nursing females (females of childbearing potential must have a negative pregnancy test at Screening and Day 1)
* Sexually active participants of reproductive potential who are not willing to follow the contraception requirements

Answer: A