Indicate the correct option matching the items in List-I with those in List-II as follows.

List-I	List-II
a. Competitive partity in advertising	1. Variations in advertising
b. Promotional elasticity of product	2. Advertising scheduling
c. Optimal promotion mix	3. Advertising expenditure
d. Pulsing advertising	4. Marginal equivalence of advertising media outlay

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

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

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

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

Answer: Option B