This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
The most predominant type of polio virus during epidemics is - 
Select and explain. 
A. Type I, B. Type II, C. Type III, D. Combined infection of II & III
A: Type I
Answer: A: Type I 
Explanation: Polio virus has three serotypes 1,2 and 3. Most outbreaks of paralytic polio are due to type-1 virus. Ref: PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page :205