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: Pediatrics
[{'content': 'A female child is brought with ambiguous genitalia and hyperpigmentation of skin. she has increased BP and hypokalemia. which of the following enzymes is deficient in this child? \nSelect and explain. \nA. 21 hydroxylase, B. 11  β hydroxylase, C. 17 α hydroxylase, D. 17, 20 Lyase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 21 hydoxylase deficiency\n11\xa0 β hydroxylase deficiency\n\n\nVirilisation of females\nVirilisation of females\n\n\nPrecocious puberty in male\nPrecocious puberty in male\n\n\nSalt losing\nSalt retention,hypertension\xa0\n\n\nhyperkalemia\nHyperkalemia', 'role': 'assistant'}]