Two springs A and B having spring constant $K_A$ and $K_B$ . ($K_A= 2K_B$ ) are stretched by applying force of equal magnitude. If energy stored in spring A is E then energy stored in B will be : -

Question

( A ) $\frac{E}{4}$
( B ) $\frac{E}{2}$
( C ) 2E
( D ) 4E