The enthalpies of combustion of carbon and carbon monoxide are $-393.5$ and $-283\;kJ\;mol^{-1}$ respectively . The enthalpy of formation of carbon monoxide per mole is

Question

$\begin{array}{1 1} (a)\;5\;kJ \\ (b)\;-110.5\;kJ \\ (c)\;-676.5\;kJ \\ (d)\;676.5\;kJ \end{array}$