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: Gynaecology & Obstetrics
[{'content': 'Which of the following is NOT to be given in cyclic mastalgia is: \nSelect and explain. \nA. Evening primrose oil, B. Danazol, C. Tamoxifen, D. Estrogen', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Mastalgia is painful breast:\nIt can be:', 'role': 'assistant'}]