Match the items of List-II with the items of List-I and find the correct matching. The items relate to economies of scale/scope.

List-I	List-II
a. Economies of scale	1. Arise with lower average costs of manufacturing a product when two complementary products are produced by a single firm
b. Internal economies	2. Mean lowering of costs of production by producing in bulk
c. External economies	3. Arise when cost per unit depends on size of the firm
d. Economies of scope	4. Arise when cost per unit depends on the size of the industry, not the firm

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

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

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

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

Answer: Option C