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: Biochemistry
[{'content': 'All are required for conversion of progesterone to estrogen except ? \nSelect and explain. \nA. Lyase, B. 11-hydroxylase, C. Reductase, D. Isomerase', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 11-hydroxylase", 'role': 'assistant'}]