This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endometrial Carcinoma and Hysterectomy, Subject name: Gynaecology & Obstetrics
[{'content': 'Effect of tamoxifen:- \nSelect and explain. \nA. Increased risk of endometrial carcinoma, B. Decreased risk of ovarian CA, C. Causes cardiotoxicity, D. Increased risk of osteoporosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Effects of tamoxifen Tamoxifen is an S.E.R.M (selective estrogen receptor modulator) Increase risk of endometrial cancer Decrease risk of osteoporosis Useful in breast cancer Menopausal symptoms like hot flushes', 'role': 'assistant'}]