This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'The following is the feature of j - reflex: \nSelect and explain. \nA. Rapid shallow breathing, B. Bradycardia, C. Hypotension, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: J -reflex is produced due to hyper inflation of the lung It produces: Apnoea followed by rapid shallow breathing, bradycardia, hypotension Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:373', 'role': 'assistant'}]