In which of the following equations, $\Delta {\mathrm{H}}^0$ reaction equals to $\Delta {\mathrm{H}}_{\mathrm{f}}^0$ for the product?

The heat of formation is defined as the heat generated or absorbed when the compound is formed form its component elements in their standard state. By this definition, $\mathrm{B}$ and $\mathrm{C}$ are clearly not correct as the starting materials are compounds. A is not correct, since ozone is not correct standard state of oxygen. So, $\mathrm{D}$ is the correct answer.

Hence the correct answer is (D) ${\mathrm{Xe}}_{\left(\mathrm{g}\right)}+2{\mathrm{ }\mathrm{F}}_{2\left(\mathrm{ }\mathrm{g}\right)}\to {\mathrm{XeF}}_{4\left(\mathrm{ }\mathrm{g}\right)}$.