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: Surgery
[{'content': 'True of carotid body tumor is ? \nSelect and explain. \nA. Non-chromaffin paraganglioma, B. Good prognosis, C. Rarely metastasises, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Answer is 'a' i.e. Non-chromaffin Paraganglioma; 'b' i.e. Good Prognosis; 'c' i.e. Rarely metastasises", 'role': 'assistant'}]