Select the option that can be used as a one-word substitute for the given group of words/phrase.
A drug or other substance that induces sleep

Correct option is D

The correct one-word for the given group of words is (d) Sedative.
· A sedative is a substance that has a calming effect, often used to induce sleep or reduce tension (Hindi: शांति कारक).
· Example: The doctor prescribed a mild sedative to help the patient sleep.
Meanings of other options:
· (a) Energetic: Full of energy and vitality (Hindi: ऊर्जावान).
· (b) Reviver: Something that brings back to life or restores energy (Hindi: पुनर्जीवक).
· (c) Stimulant: A substance that raises levels of physiological activity (Hindi: उत्तेजक).