This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': "A 30 year old women pretests a history of amenorrhoea and impaired vision of six month' duration. Physical examination shows everything except for pale optic discs and diminished visual acuity. The most likely diagnosis is - \nSelect and explain. \nA. Pituitary adenoma, B. Craniopharyngioma, C. Hypothalamic glioma, D. Benign intracranial hypeension", 'role': 'user'}, {'content': 'Answer: A \nExplanation: pituitary adenoma inhibits GnRH causes imbalance in FSH and LH causing amenorrhea and increased ICT causes compression of optic disc & visual field defects ( harrison 17 2205 )', 'role': 'assistant'}]