Match List-I with List-II and select the correct answer from the options given below:

List-I (Thinkers)	List-II (Concepts)
a. Karl Deutsch	1. Modernisation - a multifaceted process
b. Huntington	2. Circulation of elites
c. Pareto	3. The gate-keepers
d. David Easton	4. Receptors

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

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

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

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

Answer: Option C