This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
[{'content': 'Aromatase enzyme \nSelect and explain. \nA. Conves estrogen to androgen, B. Conves androgen to estrogen, C. Helps in maintaining normal placental blood flow, D. Conves testosterone to dihydrotestosterone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Aromatase enzyme conves androgens to estrogens.5a-Reductase conves testosterone to dihydrotestosteroneAromatase inhibitors block the function of the aromatase enzyme that conves androgens to estrogens. Aromatase inhibitors, including letrozole, anastrozole, and exemestane, are highly effective for both adjuvant and metastatic treatment of breast cancer in postmenopausal subjects,5a-Reductase inhibitors like finasteride, dutasteride are used in BPHG&G 12e 1953', 'role': 'assistant'}]