${\text{CH}}_{\text{3}}-\text{C}\equiv \text{CH}\underset{{\text{1\% Hg}}^{\text{2+}}}{\overset{{\text{40\% H}}_{\text{2}}{\text{SO}}_{\text{4}}}{\to }}\text{X}$

The correct statement among the following is?  

• A

   X is Acetone, it is an electrophilic addition reaction

        

• B

  X is Acetone, it is a nucleophilic addition reaction

         

• C

   X is Propanal, it is a nucleophilic addition reaction

• D

  X is Propanal, it is an electrophilic addition reaction