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: Gynaecology & Obstetrics
[{'content': "Congenital adrenal hyperplasia is most likely a result of \nSelect and explain. \nA. Defects in adrenal steroidogenic enzymes, B. Addison's disease, C. Defects in ACTH secretion, D. Defects in coicosteroid-binding globulin", 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]