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: Social & Preventive Medicine
[{'content': 'Village health Nutrition day is observed \nSelect and explain. \nA. Every day, B. Every week, C. Every month, D. Every 6 monthly', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]