This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Hypertension with androgenisation of a female child is a feature of congenital adrenal hyperplasia due to deficiency of- \nSelect and explain. \nA. C-21 hydroxylase, B. C-11 hydroxylase, C. C-17 hydroxylase, D. Desmolase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]