The bond energy of $O-H$ bond is $109\: kcal/mol$. The value of $\Delta H_f$ of $H2_O(g)$ is

$\begin {array} {1 1} (A)\;-218\: kcal/mol & \quad (B)\;109\: kcal/mol \\ (C)\;\text{Can’t be determined from given data} & \quad (D)\;218 \: kcal/mol \end {array}$

We require bond dissociation energies of $H-H$ and $O-O$ bonds.
Ans : (C)