Select the measures that can be taken to control the diseases caused by a house fly?
Bacterium
Virus
Protozoan
Nematode+
House flies can be controlled by the following ways:
i) Debris and the decomposed organic matter should be destroyed scientifically or burnt out.
ii) Flies should be destroyed by spraying DDT powder or bleaching powder
iii) Debris, faecal matter and other decomposed matters should be well covered.
iv) Food and drinks must be kept properly covered.