Answer
Option- c. 4
Work Step by Step
Given expression is-
= $ 4 \cos^{2} 30^{\circ}$ + $ 2 \sin 30^{\circ}$
= $ 4 (\frac{\sqrt 3}{2})^{2} + 2(\frac{1}{2})$
( substituting for exact values of trigonometric functions)
= $ 4(\frac{3}{4}) + 1$
= 3+1
= 4
