Standard entropy of $X_2, Y_2$ and $XY_3$ are 60, 40 and 50 $JK^{-1}mol^{-1}$, respectively. For the reaction,$\frac{1}{2}X_2+\frac{3}{2}Y_2\rightarrow XY_3,\Delta H=-30KJ$, to be at equilibrium, the temperature will be

Question

( A ) 1250 K
( B ) 750 K
( C ) 500 K
( D ) 1000 K