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': 'World anti-tobacco day is celebrated on \nSelect and explain. \nA. 12th July, B. 5th June, C. 31st may, D. 24th November', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]