system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most common mode of transmission of polio virus?
assistant
The correct answer is  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.