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
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: 
Select and explain. 
A. Pituitary adenoma, B. Craniopharyngioma, C. Sheehan's syndrome, D. Pinealoma
A: Pituitary adenoma
Answer: A: Pituitary adenoma 
Explanation: 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