$MgO(s) + 2HCl(aq) \longrightarrow MgCl_2(aq) + H_2O(l)$; The absolute enthalpy of neutralisation of the reaction is

Question

(a) less than -57.33 kJ $mol^{-1}$
(b) -57.33 kJ $mol^{-1}$
(c) greater than -57.33 kJ $mol^{-1}$
(d) 57.33 kJ $mol^{-1}$