This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': 'Daily regularment of Vit A in children is - \nSelect and explain. \nA. 40, B. 400, C. 1500, D. 5000', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Daily requirement in children is 400mcg. (1-6yrs) Ref : Park 25th edition Pgno : 653', 'role': 'assistant'}]