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
Most common mode of transmission of polio virus? 
Select and explain. 
A. Droplet infection, B. Fecal-oral route, C. Blood transfusion, D. Veical transmission
B: Fecal-oral route
Answer: B: Fecal-oral route 
Explanation: Ans. is 'b' i.e., Fecal-oral route . Polio transmission is mostly restricted to developing countries where fecal-oral route is the most common mode of transmission.