The enthalpy of neutralisation of oxalic acid by strong base is 25.4 kcal/mol. The enthalpy of neutralisation of strong acid and strong base is -13.7 kcal/equil. The enthalpy of dissociation of $H_2C_2O_4 \leftrightharpoons 2H^+ + C_2O_4^{2-}$ is

Question

(a) 1.0 kcal/mol
(b) 2.0 kcal/mol
(c) 18.55 kcal/mol
(d) 11.7 kcal/mol