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
Anti tobacco day is: September 2009 
Select and explain. 
A. 1May, B. 15-May, C. 25-May, D. 31-May
D: 31-May
Answer: D: 31-May 
Explanation: Ans. D: 31st May World No Tobacco Day is observed around the world every year on May 31. It is meant to encourage a 24-hour period of abstinence from all forms of tobacco consumption across the globe.