The correct option is D Equilibrium will shift forward
2N2O(g)+O2(g)⇌4NO(g); ΔH>0
Kc=[NO]4[N2O]2[O2]
When volume of the vessel increases, number of moles per unit volume (i.e. molar concentration) of each reactant and product decreases. As there are 4 concentration terms in the numerator but 3 concentration terms in the denominator, to keep K constant, the decrease in [N2O] and [O2] should be more i.e., equilibrium will shift in the forward direction.