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': '3 - tier Panchayati Raj system was proposed by \nSelect and explain. \nA. Kartar sings committee, B. Srivartava sings committee, C. Balwant Rai mehta committee, D. Mudaliar committee', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]