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
Surveillance every Fonight is according to which malaria programme 
Select and explain. 
A. Urban malaria scheme, B. National malaria control programme, C. Modified plan of operation, D. Malaria eradication programme
C: Modified plan of operation
Answer: C: Modified plan of operation 
Explanation: Ans. is 'c' i.e.,Modified plan of operation According to modified plan of operation active and passive surviellance should be done every fonight.Under The modified plan of operation, the endemic areas were reclassified according to annual parasite incidence (API)with different strategy for control measures.The repo of the consultative committee of expes indicated that in order to stabilize the malaria situation in the country,areas with API 2 and above should be taken up for regular spray operations (every 6 weeks).