Which of the following will undergo substitution in the ortho and para
positions rather than in the meta position?
(a) Nitrobenzene
(b) Benzoic acid
(c) Acetanilide
(d) Benzaldehyde
positions rather than in the meta position?
(a) Nitrobenzene
(b) Benzoic acid
(c) Acetanilide
(d) Benzaldehyde