Social & Preventive Medicine General 328448bc If in a locality API is more than 2, the folloiwng is done- A 2 round of DDT per year with active surveillance B 2 rounds of DDT per year with active and passive surveillance C Only active and passive surveillance D 2 rounds of DDT per year only High-Yield Explanation Ans. is 'b' i.e., 2 rounds of DDT per year with active and passive surveillance