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: Social & Preventive Medicine
[{'content': 'Most common cause of infant moality? \nSelect and explain. \nA. LBW, B. Injury, C. A, D. Tetanus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., LBW", 'role': 'assistant'}]