Tranquilizers are the substances used for the treatments of

The correct answer is Option (3) → Mental diseases

Tranquilizers are used for the treatment of stress and mild or even severe mental diseases; they relieve anxiety by inducing a sense of well-being. Examples are the barbiturates (veronal, luminal), valium, chlordiazepoxide, meprobamate and equanil.

Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.

NCERT (Pre-rationalised edition, 2022-23):
Tranquilizers