Match the species in List I with their types List II.

List-I	List-II
a. DDT	1. Photochemical smog
b. NaClO3	2. Disinfectant
c. Cl2	3. Herbicides
d. PAN	4. Pesticides

A. a-3, b-2, c-1, d-4

B. a-4, b-3, c-2, d-1

C. a-2, b-1, c-4, d-3

D. a-1, b-4, c-3, d-2

Answer: Option B