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
Which of the following is primary prevention 
Select and explain. 
A. Screening test, B. Early diagnosis, C. Use of mosquito net, D. Restoration of lost function
C: Use of mosquito net
Answer: C: Use of mosquito net 
Explanation: Ans. is 'c' i.e., Use of mosquito net