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': 'Bharat Nirman Scheme was launched in: \nSelect and explain. \nA. 2004, B. 2005, C. 2006, D. 2007', 'role': 'user'}, {'content': 'Answer: B \nExplanation: It was launched for a four year period 2005-2009 for improvement of rural infrastructure. Ref: Health policies and programmes in India, D.K. Taneja 11th edition page: 393', 'role': 'assistant'}]