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: Pharmacology
[{'content': 'Use of tamoxifen in carcinoma of breast patients does not lead to the following side effects : \nSelect and explain. \nA. Thromboembolic events, B. Endometrial carcinoma, C. Cataract, D. Cancer in opposite breast', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]