This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
Ivacaftor was approved by FDA in 2018 for 
Select and explain. 
A. Cystic fibrosis, B. Migraine, C. Hypeension, D. Glycogen storage disorders
A: Cystic fibrosis
Answer: A: Cystic fibrosis 
Explanation: Ivacaftor is used for treating cystic fibrosis