Match the following:

List-I (Term)	List-II (Explanation)
a. F-stop	1. The element in a photograph
b. Pixel	2. The one that an experiment is not done on
c. View finder	3. Opening in a camera that controls the amount of light passing into the lense
d. Control group	4. The screen that shows the framing of an image

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

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

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

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

Answer: Option B