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 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: None