Consider the following: 

  1. Biopesticides 
  2. Pesticides 
  3. Mosquito Repellants 
  4. Chemical Fertilizers

Which among the above have contributed to the decreasing population of “Birds’?

[A] Only 2 & 4
[B] Only 1, 2, 4
[C] Only 2, 3, 4
[D] Only 2

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