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: Pediatrics
A 6–month–old infant presents to the 'diarrhoea clinic' unit with some dehydration. The most likely organism causing diarrhea is – 
Select and explain. 
A. Entamoeba histolytica, B. Rotavirus, C. Giardia lamblia, D. Shigella
B: Rotavirus
Answer: B: Rotavirus 
Explanation: Ghai states - "In India Rotavirus and enterotoxogenic E.coli account for nearly half of the total diarrhoea) episodes among children".