This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'Ghrelin is responsible for - \nSelect and explain. \nA. Stimulation of appetite, B. Suppression of appetite, C. Stimulation of of sleep, D. Suppression of sleep', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ghrelin, secreted from oxyntic glands, stimulates acid secretion but also appetite and gastric emptying . Ref - Davidsons 23e p767', 'role': 'assistant'}]