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': 'The first hormone secretion that is affected in a pituitary lesion is- \nSelect and explain. \nA. FSH,LH, B. ACTH, C. TSH, D. GH', 'role': 'user'}, {'content': 'Answer: D \nExplanation: GH secreting somatotrope constitute about 50% of anterior pituitary cell population ( Harrison 17 pg 2207)', 'role': 'assistant'}]