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
True about diarrhea – 
Select and explain. 
A. Blood mixed with mucous stool is defined as dysentery, B. Rota virus is the MC organism in children, C. Persistent diarrhea is defined if duration is more than 21 days, D. All of these
D: All of these
Answer: D: All of these 
Explanation: DIARRIFEAIN CHILDREN
Diarrhoea - It is the passage of liquid or watery stool more than three times a day. However it is the recent change in consistency of stools rather than the number of stools that is the more  important feature.
Persistent diarrhoea - It is defined as diarrhoea of presumed infectious origin that begins acutely and lasts for 14 days or more (2-4 weeks).
Chronic diarrhea - Diarrhea lasting > 4 weeks.
Dysentery - Characterized by the presence of blood and pus in the stools, abdominal cramps and fever.
In India, rotavirus and ETEC accounts for nearly half the total diarrhea! episodes among children.