This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
[{'content': 'Baroreceptor are ? \nSelect and explain. \nA. Carotid body, B. Carotid sinus, C. Aoic body, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]