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REASONING
The reason for the increasing number of ...

The reason for the increasing number of malaria patients is that

A

the population has greatly increased rendering any effort to maintain cleanliness almost impossible

B

the mosquitoes have become DDT resistant

C

the sanitary conditions are poor in villages

D

all the above

Text Solution

Verified by Experts

The correct Answer is:
B
DDT has lost its use as an insecticide because insects have developed immunity against it.
Therefore, the reason for the increasing number of malaria patients is that the mosquitoes have become DDT resistant.
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