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
World anti-tobacco day is celebrated on 
Select and explain. 
A. 12th July, B. 5th June, C. 31st may, D. 24th November
C: 31st may
Answer: C: 31st may 
Explanation: None