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

List-I	List-II
a. Maintenance of cell permeability	1. Potassium
b. Opening and closing stomata	2. Calcium
c. Pollen germination	3. Magnesium
d. Component of chlorophyll	4. Boron

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

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

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

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

Answer: Option B