Match List I (Chromosome models) with List II (Discoverers) and choose the correct answer:

List-I	List-II
a. Simple multi-stranded model	1. DuPraw
b. Centipede model	2. Nebel
c. Coiled coil model	3. Steffensen
d. Folded fibre model	4. Taylor

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

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

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

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

Answer: Option D