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 
Select and explain. 
A. 31st May, B. 1-Dec, C. 7th April, D. 29th September
A: 31st May
Answer: A: 31st May 
Explanation: World health day - 7th April.
World AIDS day - 1 December.
World Anti-Tobacco day - 31st May.
World Heart day - 29th September.
World Anaesthesia day - 16 October.
National Epilepsy day - 17th November.