This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Pediatrics
Which of the following is the leading cause of mortality in under 5 children in developing countries? 
Select and explain. 
A. Malaria, B. Acute lower respiratory tract infections (LRTI), C. Hepatitis, D. Prematurity
D: Prematurity
Answer: D: Prematurity 
Explanation: d. Prematurity(Ref: Nelson's 20/e p 2088-2093, Ghai 8/e p 379-381)Causes of under 5 child deaths: The area to the right of the dotted line indicates neonatal conditions