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': 'The meal provided in mid-day meal program should supply at least - \nSelect and explain. \nA. 1\\/2 of proteins and 1\\/2 of the calories required per day, B. 1\\/2 of proteins and 1\\/3 of the calories required per day, C. 1\\/3 of proteins and 1\\/3 of the calories required per day, D. 1\\/3 of proteins and 1\\/2 of the calories required per day', 'role': 'user'}, {'content': "Answer: B \nExplanation: The meal should supply at least 1/2 of proteins and 1/3 of the calories required per day. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 611", 'role': 'assistant'}]