Of the reactions given below, the reaction whose number of moles of products increases by the addition of inert gases into the reaction chamber at constant pressure and temperature is
(a) H2 + 1/2O2 → H2O
(b) CO+ 1/2O2 → CO2
(c) N2 + O2 → 2NO
(d) N2 → 2N
(e) All of the above.