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: Social & Preventive Medicine
[{'content': 'Wrong about polio patient who had paralysis \nSelect and explain. \nA. Can transmit It by nasal discharge, B. Sub clinical infection common, C. Most predominant polio virus during epidemic is type I, D. Can be given vaccine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]