a
In option \((B)\,-\,\Delta n_g\) is \(-ve\) therefore increase in pressure will bring reaction in forward direction. In option \((C)-\) as the reaction is exothermic therefore increase in temperature will decrease the equilibrium constant. In option \((D)-\) Equilibrium constant changes only with temperature. Hence, option \((B), (C)\) and \((D)\) are correct therefore option \((1)\) is incorrect choice.