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': "One-third of the Rajya Sabha member's retire every? \nSelect and explain. \nA. Three years, B. Four years, C. Two years, D. One year", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Two years", 'role': 'assistant'}]