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
[{'content': 'Insulin secretion is decreased by: \nSelect and explain. \nA. Glucagon, B. Glucose, C. Adrenaline, D. Vagal stimulation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Adrenalin', 'role': 'assistant'}]