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: Pediatrics
True about polio - 
Select and explain. 
A. Paralytic polio is most common, B. Spastic paralysis, C. IM injections and increased muscular activity lead to increased paralysis, D. Polio drop given only in < 3 year
C: IM injections and increased muscular activity lead to increased paralysis
Answer: C: IM injections and increased muscular activity lead to increased paralysis 
Explanation: None