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: Physiology
Which decreases secretion of both insulin and glucagon ? 
Select and explain. 
A. Epinephrine, B. Somatostatin, C. Increased blood glucose, D. None
B: Somatostatin
Answer: B: Somatostatin 
Explanation: Ans. is b i.e., SomatostatinSomatostatin inhibits secretion of :?i) GH and TSHii) Both insulin and glucagonAbout other optionsEpinephrine stimulates glucagon secretion and inhibits insulin secretion.Increased blood glucose stimulates insulin secretion and inhibits glucagon secretion.