Match list-I with list-II and select the correct answer:

List I (Aids)	List II (Methods of contact)
a. Model	1. Group contact
b. Slide	2. Mass contact
c. Telephone	3. Personal contact
d. Poster	4. Mass contact

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

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

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

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

Answer: Option B