Given, standard enthalpy of formation $(\Delta _f H^\circ)$ at 298 k for methane is -74.8 kJ/mol. What other information is required to determine the average energy for C-H bond formation would be

Question

(a) The first four ionisation of carbon and electron gain enthalpy of hydrogen
(b) The dissociation energy of hydrogen molecule $H_2$
(c) The dissociation energy of $H_2$ and enthalpy of sublimation of carbon
(d) latent heat of vaporisation of methane