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 low birth weight \nSelect and explain. \nA. Intrauterine growth Retardation, B. Chromosomal Abnormalities, C. Anemia in mother, D. Prematurity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]