question_answer

Directions : (21 - 25)

Case V : Read the passage given below and answer the following questions from 21 to 25.

Reimer-Tiemannreactionintroducesanaldehyde group, on aromatic ring of phenol, ortho to the hydroxyl group. This is a general method for the synthesis of substituted salicylaldehydes as depicted below:

Reimer-Tiemann reaction is an example of

A) nucleophilic substitution reaction

B) electrophilic substitution reaction

C) nucleophilic addition reaction

D) electrophilic addition reaction.