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
WHO Malaria Mass Drug Administration – 
Select and explain. 
A. API >5, B. > 2, C. 15, D. 25
B: > 2
Answer: B: > 2 
Explanation: First you should know what does mass prophylaxis mean in malaria.
In areas with high malaria prevalence, presumptive treatment is given to all people. This is know as mass treatment.
Presumptive treatment is given when API is >2