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': 'When is the World No Tobacco Day celebrated? \nSelect and explain. \nA. 1st May, B. 31st May, C. 1st August, D. 31st August', 'role': 'user'}, {'content': 'Answer: B \nExplanation: World no tobacco day is celebrated on 31st May. Ref: Health policies and programmes in India, D.K. Taneja 11th edition page: 368', 'role': 'assistant'}]