Through which of the following reactions the number of carbon atoms can be increased in the chain?

A: Grignard reaction

B: Cannizaro’s reaction

C: Aldol condensation

D: HVZ reaction

<p>This is a Multiple Choice Type Questions as classified in NCERT Exemplar</p><p><strong>Correct option: A and C</strong></p><p>Grignard Reaction is the addition of an organomagnesium halide to form a tertiary or secondary alcohol.</p><p>Canizzaro's Reaction involves the base induced disproportionation of two molecules. Aldol Condensation is an organic reaction when an enolate ion reacts with a carbonyl compound to form beta hydroxy ketone with dehydration to give a conjugated enone.</p><p>The HVZ reaction involves alpha bromination of carboxylic acids and this reacts with chlorine or bromine in presence of a small amount of red phosphorus to give alpha halo carboxylic acids.&nbsp;</p>

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