This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Health care of community & international health, Subject name: Social & Preventive Medicine
World health day - 
Select and explain. 
A. 7th April, B. 7th July, C. 7th Dec, D. 7th Feb
A: 7th April
Answer: A: 7th April 
Explanation: The constitution came into force on 7 th April 1948 which is celebrated every year as "world health Day ".A world health day theme is chosen each year to focus attention on a specific aspect of public health (refer pgno:919 park 23rd edition)