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': 'Not true about Polio \nSelect and explain. \nA. Subclinical cases are more common, B. <1% cases will show paralysis, C. Can be transmitted  by nasal discharge, D. Type 1 Polio virus causes epidemics more commonly', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]