This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics And Genetic Disorders, Subject name: Pediatrics
[{'content': 'Gene therapy is most commonly targeted against: \nSelect and explain. \nA. SCID, B. cancer, C. cystic fibrosis, D. Leukemia', 'role': 'user'}, {'content': "Answer: A \nExplanation: a. SCID(Ref: Nelson's 20/e p 584-586)FDA-approved gene therapy is used for ADA-SCID, Leber's congenital amaurosis, multiple myeloma & Adrenoleukodystrophy", 'role': 'assistant'}]