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': 'Mid-day meals provided in schools provide- \nSelect and explain. \nA. 1\\/2 of total calories & 1\\/2 of protein, B. 1\\/3 of total calories & 1\\/2 of protein, C. 1\\/2 of total calories & 1\\/3 of protein, D. 1\\/3 of total calories & 1\\/4 of protein', 'role': 'user'}, {'content': "Answer: B \nExplanation: The meal should be atleast one-third of the total energy requirement and half of protein need.REF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-611.", 'role': 'assistant'}]