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: Pharmacology
[{'content': 'Which of the following drugs is a SERM useful for treatment of osteoporosis \nSelect and explain. \nA. Raloxifen, B. Bisphoshonates, C. Strontium, D. Estradiol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Refer Katzung 11/e p 759. Raloxifen is a selective estrogen receptor modulator with estrogen agonistic action on bone and antagonistic action on breast and endometrium It is therefore the preferred drug for the treatment and prevention of post menopausal osteoporosis', 'role': 'assistant'}]