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': 'Uses of estrogen are all except - \nSelect and explain. \nA. Senile vaginitis, B. Carcinoma prostate, C. Breast cancer, D. Delayed pubey', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Breast cancer Antiestrogens (not estrogen) are used in breast cancer.", 'role': 'assistant'}]