Indian mosquitoes have become resistant to

Options :
  1. BHC
  2. cinerein
  3. pyrthroids
  4. all the above
Answer and Explanation :-

Answer: Option 1

Explanation:

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Some people like me, some don't. I don't understand, Where the difference comes from. My heart like them all. For a simple childish reason. We all are created equal, we all are humans.
-Santosh Kalwar A Very First Book Of Poems: Heartbreak