Match the items of List-I with the items of List-II and find the correct combination.

List-I (Market Structure)	List-II (Nature of industry where prevalent)
a. Perfect competition	1. Aluminium and passenger cars
b. Oligopoly	2. Public utilities like Telephones and Electricity
c. Monopoly	3. Manufacturing: T.V. Sets, Refrigerators
d. Monopolistic competition	4. Farm Products: Grains

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

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

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

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

Answer: Option B