This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders in Menstruation, 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. CT of 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: Ans. is a, i.e. Pituitary adenomaRef: Novak 14th/ed, p1104,1109; Harrison 17th/ed, p2205-2206; Williams Gynae 1st/ed, p 338 onwards', 'role': 'assistant'}]