Prelims G.S. question 44

From our Mock Series (Mock-9)

Q.70 Consider the following :

1) CFL

2) Incandescent lamps

3) LED lamp

Indiscrimate or improper disposal of which among the above causes mercury pollution ?

A) Only 1

B) 2 & 3

C) 1 & 2

D) 1,2,3