This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Diganosis of polio - 
Select and explain. 
A. Detection of polio virus in stool, B. Serology, C. Limb wasting, D. AFP
A: Detection of polio virus in stool
Answer: A: Detection of polio virus in stool 
Explanation: As fecal excretion may be intermittent ,the best results are obtained by testing fecal samples collected on two seperate days as early in the illness as possible. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO:487