Which of the following reaction(s) is/are correct?

Options

A. a.
B. b.
C. c.
D. d.

Answer

A, D

Explanation

a. `NaBH_(4)` only reduces `(-CHO)` group to alcohol but does not reduce `(-NO_(2))` group, hence it is the correct answer.
b. The `(-NO_(2))` group is not reduced to `(-NH_(2))` group with `NaBH_(4)`. So it is the wrong answer.
c. LAH reduces

group to `2^(@)` alcohol and also `(RNO_(2))` group to `(R-NH_(2))` group and `(ArNO_(2))` group to `(Ar-N=N-Ar)`. So it is the wrong answer.
d. It is the correct answer because `ArNO_(2)` has been reduced to `Ar-N=N-Ar`, and simultaneously

to `2^(@)` alcohol.
So the answer are `(a)` and `(d)`.