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

List-I (Different Fibre Generation)	List-II (Optical Components Used)
a. First	1. Graded index multimode fibre and 1310 nm LD
b. Second	2. Graded index multimode fibre and 850 nm LD
c. Third	3. Step index monomode fibre and 1550 nm LD
d. Fourth	4. Step index monomode fibre and 1310 nm LD

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

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

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

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

Answer: Option D