The correct option is D −208.1 kJ/mol
As, Enthalpy of hydrogenation of cyclohexene is −119.5 kJ/mol, i.e, Hydrogenation of one C=C is −119.5 kJ/mol.
∴ ΔHcal for benzene is 3×−119.5=−357 kJ/mol
So,
ΔHobs=ΔHcal+Energy needed to disturb resonance
=(3×−119.5)+150.4=−208.1 kJ/mol
Thus, enthalpy of hydrogenation of benzene is −208.1 kJ/mol