The heats of combustion of carbon and carbon monoxide are $-393.5$ and $-283.5\; kJ\; mol^{-1}$, respectively. The heat of formation (in kJ) of carbon monoxide per mole is :

Question

$\begin{array}{1 1} (1)110.5 \\ (2)676.5 \\(3)-676.5 \\ (4)-110.5 \end{array} $