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: Pediatrics
[{'content': 'Normal weight of infant at 1 year from bih is: September 2007 \nSelect and explain. \nA. Doubled, B. Trippled, C. Quadrupled, D. Variable increase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Trippled Normal Weight Increases: Weight doubles by 6 months of age Weight triples by 1 year of age Weight quadruples by 2 years of age Annual increase (Ages 2-9): 2.0 kg/year', 'role': 'assistant'}]