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 years old mother of two children is suffering from amenorrhea for last 12 months. She has history of failure of lactation following 2nd delivery but remained asymptomatic thereafter. Skull X-ray shows "Empty sella". Most likely diagnosis is: \nSelect and explain. \nA. Menopause, B. Pituitary tumor, C. Sheehan\'s syndrome, D. Intraductal papilloma of breast', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Amenorrhea, failure of lactation and "Empty sella" in skull X-ray give the diagnosis of Sheehan\'s syndrome. Ref: Current Obs and Gynae Diagnosis and Treatment 8th Edition, Page 446 ;Internal Medicine: An Illustrated Radiological Guide By Jarrah Ali Al-Tubaikh, 2010, Page 247', 'role': 'assistant'}]