In which of the following pairs the enthalpy of neutralization is less than or more than the standard value

The enthalpy of neutralization of strong acids by strong bases is equal to the standard enthalpy of neutralization  i.e. $-13.9\mathrm{kcal}/\mathrm{mol}$. But $\mathrm{HCN}$ is a weak acid and $\mathrm{NaOH}$ is a strong base so, the enthalpy of neutralization for this pair is less than the standard value, i.e., -12.13 kcal.