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
Most common type of polio is ? 
Select and explain. 
A. Non-paralytic polio, B. Paralytic polio, C. Aboive illness, D. Inapparent infection
D: Inapparent infection
Answer: D: Inapparent infection 
Explanation: Ans. is `d' i.e., Inapparent infection