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: Microbiology
Site of action of polio virus is 
Select and explain. 
A. Medullary cone, B. Posterior roots, C. Anterior horn of spinal cord, D. Posterior horn of spinal cord
C: Anterior horn of spinal cord
Answer: C: Anterior horn of spinal cord 
Explanation: Polio virus acts at motor nerve ending i.e anterior horn cells of spinal cord leads to flaccid paralysis.