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': "A woman has 2 kids. She presents with galactorrhea and amenorrhea for 1 year. The most probable diagnosis is: \nSelect and explain. \nA. Pregnancy, B. Pituitary tumor, C. Sheehan's syndrome, D. Metastasis to pituitary from other carcinoma", 'role': 'user'}, {'content': 'Answer: B \nExplanation: The female in the question is presenting with galactorrhea and amenorrhea for 1 year which raises the suspicion for pituitary tumor i.e. prolactinoma/pituitary adenoma.\nPituitary Adenomas:\nMost common pituitary adenoma is prolactionomas', 'role': 'assistant'}]