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
The first hormone secretion that is affected in a pituitary lesion is- 
Select and explain. 
A. FSH,LH, B. ACTH, C. TSH, D. GH
D: GH
Answer: D: GH 
Explanation: GH secreting somatotrope constitute about 50% of anterior pituitary cell population ( Harrison 17 pg 2207)