This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
[{'content': 'Weight of an infant doubles by what age? \nSelect and explain. \nA. 6 months, B. 1 year, C. 2 years, D. 3 years', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 6 months *Weight of an infant doubles by 5 months and quadruples by 2 years of age.AgeWeightBirth3kg5 months6kg (2 x birth weight)1 years9kg (3 x birth weight)2 years12kg (4 x birth weight)3 years15kg (5 x birth weight)5 years18kg (6 x birth weight)7 years21kg (7 x birth weight)10 years30kg (10 x birth weight)", 'role': 'assistant'}]