The molar heat capacity for the process shown in the figure is

Given : which gives us

pVg = K, where p = pressure, V = volume, and g and K are constants. This represents an adiabatic process.

In an adiabatic process, Q(heat exchanged) = 0.

Now we know that Q = nCdT,

where n = number of moles, C = specific molar heat capacity and dT = rise in temperature.

Since Q = 0, we get C = 0.

Hence, the correct option is (d).