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
[{'content': 'Which of the following is the leading cause of mortality in under 5 children in developing countries? \nSelect and explain. \nA. Malaria, B. Acute lower respiratory tract infections (LRTI), C. Hepatitis, D. Prematurity', 'role': 'user'}, {'content': "Answer: D \nExplanation: 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", 'role': 'assistant'}]