Answer:
E. addition to the carbonyl by a nucleophile is followed by loss of the leaving group
Explanation:
Nucleophilic acyl substitution -
It is the type of substitution reaction , in which a nucleophile is substituted to the carbonyl center with the removal of a leaving group , is known as a nucleophilic acyl substitution .
In this reaction , a good nucleophile , i.e. electron rich species attacks the carbonyl position of the acyl group , and tends to remove the leaving group and gives the final product of the reaction .
