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: Medicine
[{'content': 'A 30 year old woman presented with secondary amenorrhoea for 3 years along with galactorrhoea. The most likely cause of her symptoms would be: \nSelect and explain. \nA. Craniopharyngioma, B. Prolactinoma, C. Meningioma, D. Sub-arachnoid haemorrhage', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Prolactinoma): Menstrual cycle disturbance in the form of amenorrhea along with galactorrhea suggests a diagnosis of hyperprolactinemia. Amongst the options provided the tumor most likely to produce above endocrine manifestation is a prolactinoma. Prolactinomas: Most common functional pituitary adenomas Q', 'role': 'assistant'}]