Bond dissociation enthalpy of $H_2$ , $Cl_2$ and HCl are 434, 242 and 431 kJ $mol^{ –1}$ respectively. Enthalpy of formation of HCl is -

Question

( A ) $245 kJ mol^{–1}$
( B ) $–93 kJ mol^{ –1}$
( C ) $–245 kJ mol^{ –1}$
( D ) $93 kJ mol^{–1}$