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': 'The use of tamoxifen for breast cancer can cause all of the following adverse effects, except: \nSelect and explain. \nA. The use of tamoxifen for breast cancer can cause all of the following adverse effects, except:, B. Endometrial carcinoma, C. Carcinoma in contralateral breast, D. Cataract', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tamoxifen reduces the recurrence rate of breast cancer in ipsilateral as well as contralateral breasts. Adverse effects associated with the use of tamoxifen are: 2-3 fold increased risk of thromboembolism 2-3 fold increased risk of endometrial carcinoma Hot flushes, vomiting, vaginal discharge, menstrual irregularities Cataract, dermatitis, depression, mild leucopenia', 'role': 'assistant'}]