Match the following List I with List II.

List-I	List-II
a. NO	1. Insecticide
b. PAN	2. Primary pollutant
c. BHC	3. Herbicide
d. NaClO3	4. Secondary pollutant

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

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

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

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

Answer: Option B