[PPSC Principal, HM and BPEO, 2020]

34. DDT, an organochlorine compound, used first to control malaria, carried in mosquitoes and later to a variety of insects/pests, is now banned because

1. It brings about a change in sex chromosomes

2. It persists in the environment and bio accumulates

3. It increases its affinity hundred fold for haemoglobin preventing its coupling with oxygen

4. All of the above

Correct Answer :

It persists in the environment and bio accumulates