If the equilibrium constant for the reaction $2AB \rightleftharpoons A_2 + B_2$ is 49; what is the value of equilibrium constant for $AB \rightleftharpoons \frac{1}{2}A_2 +\frac{1}{2}B_2$ ?

Question

( A ) 7
( B ) 49
( C ) 0.02
( D ) 2401