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': 'An infant is diagnosed with MEN-2B trait. Which the following will be best line of management \nSelect and explain. \nA. Prophylactic surgery, B. Clinical observation and follow up, C. Regular FNAC, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]