Surveillance every Fonight is according to which malaria programme

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).