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 35 year old female patient, Radha, having children aged 5 and 6 years has history of amenorrhea and galactorrhea. Blood examination reveals increased prolactin. The CT of the head is likely to reveal: \nSelect and explain. \nA. Pituitary adenoma, B. Craniopharyngioma, C. Sheehan's syndrome, D. Pinealoma", 'role': 'user'}, {'content': "Answer: A \nExplanation: Patient with amenorrhea, galactorrhea and increased prolactin level give the diagnosis of prolactinoma which is the most common pituitary adenoma. Ref: Current Obs and Gynae Diagnosis and Treatment, 9th Edition, Page 152 ; Harrison's Principles of Internal Medicine, 14th Edition, Page 1989 and 17th Edition, Pages 2200, 2206", 'role': 'assistant'}]