Find the odd one out with respect to reaction with carbon.

As Na, K and Ca are highly reactive metals, they form a strong ionic bond with oxygen to form their respective oxides. These molecules cannot be reduced by reducing agents like carbon due to their strong bond dissociation energies.

On the other hand, Zn forms relatively less strong bond with oxygen as it is less reactive compared to Na, K and Ca. 

So, Zinc oxide can be easily reduced by reducing agents like carbon.

The chemical reaction is given as:$\mathrm{ZnO}+\mathrm{C}\to \mathrm{Zn}+\mathrm{CO}$

Hence the correct answer is ZnO.