This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sex Hormones, Subject name: Physiology
[{'content': 'The enzyme, 5a-reductase is responsible for: \nSelect and explain. \nA. Conversion of cholesterol to pregnenolone and enhancing steroidogenesis, B. Conversion of testosterone to dihydrotestosterone, C. Aromatization of testosterone to estradiol, D. Increasing the synthesis of LH', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Conversion of testosterone to dihydrotestosterone5 a -Reductase is the enzyme that converts testosterone to dihydrotestosterone. 5 a -Reductase is associated with increasing the most potent androgen, dihydrotestosterone, and reducing LH secretion. Estrogens are associated with female secondary sex characteristics, although some androgens regulate pubic hair development.', 'role': 'assistant'}]