One-fourth of the sum of prime numbers, greater than 4 but less than 16, is the square of = ?

Answer: Option A

Sum of prime numbers greater than 4 but less than 16
$$\begin{array}{rl}& =\left(5+7+11+13\right)\\ & =36\\ & \therefore \frac{1}{4}\times 36\\ & =9\\ & =3^2\end{array}$$