This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
[{'content': 'Stimulation of proximal cut end of vagus causes \nSelect and explain. \nA. Apnea, B. | HR, C. |BP, D. #NAME?', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Stimulation of proximal cut vagus nerve produces apnoea Ref guyton and hall textbook of medical physiology 12 edition page number:370,371,372', 'role': 'assistant'}]