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
In breast fed infant less chance of enteric infection is due to – 
Select and explain. 
A. Breast milk nutrients, beneficial effect an immune system, B. Ig in breast milk, C. Sterile nature of breast milk, D. All of these
D: All of these
Answer: D: All of these 
Explanation: None