Match the following.

List-I	List-II
a. All India Trade Union Congress (AITUC)	1. 1971
b. Indian National Trade Union Congress (INTUC)	2. 1947
c. Hind Mazdoor Sabha (HMS)	3. 1955
d. Centre of Indian Trade Union (CITU)	4. 1920
e. Bhartiya Mazdoor Sangh (BMS)	5. 1967
f. National Front of Indian Trade Union (NFITU)	6. 1948

A. a-1, b-2, c-3, d-4, e-5, f-6

B. a-4, b-2, c-6, d-1, e-3, f-5

C. a-3, b-4, c-1, d-2, e-5, f-6

D. a-6, b-5, c-4, d-3, e-2, f-1

Answer: Option B