What value of g will make the expression 4x

^{2}– 18xy + g a perfect square?-
**A.**

9 -
**B.**

(frac{9y^2}{4}) -
**C.**

81y^2 -
**D.**

(frac{18y^2}{4})

##### Correct Answer: Option D

##### Explanation

4x^{2} – 18xy + g = g (to) ((frac{18y}{4}))^{2}

= (frac{18y^2}{4})