For a cell reaction involving a two-electron change, the standard emf of the cell is found to be 0.295 V at $25^{\circ}$. The equilibrium constant of the reaction at $25^{\circ}C$ will be :

Question

( A ) $1 \times 10^{-10}$
( B ) $29.5 \times 10^{-2}$
( C ) $10$
( D ) $1 \times 10^{10}$