This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology metabolism, Subject name: Physiology
Which of the following hormones increase during sleep? 
Select and explain. 
A. Insulin, B. ACTH, C. GH, D. Glucocorticoid
C: GH
Answer: C: GH 
Explanation: Ans: C (GH) Ref: Pal GK. Pituitary Gland: The Anterior Pituitary, In: Textbook of Medical Physiology, Ahuja Publishing House 2007: 44:328,336Explanation:70% of total 24 hours GH secretion occurs during sleep. Adequte sleep promotes growth.ACTH - 75% of daily secretion occurs in early morning.Insulin secretion is mainly decided by glucose uptake and its plasma concentration.Glucocorticoid secretion follows the ACTH pattern.