Match List I (Electromagnetic Wave) with List II (Discoverer) and select the correct answer:

List-I	List-II
a. Infrared waves	1. Ritter
b. Ultraviolet rays	2. Newton
c. X-rays	3. Herchel
d. Visible rays	4. W Roentgen

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

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

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

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

Answer: Option B