Select the most appropriate synonym of the highlighted word.
Caves like Ajanta lie in perpetual darkness.

Correct option is A

The correct synonym of the given word is (a) Permanent.
Perpetual: Never-ending or continuous; lasting forever or for a very long time. (सदैव बना रहने वाला)
Example: The region is covered in perpetual snow.
Permanent: Lasting or intended to last indefinitely without change. (स्थायी)
Example: He found permanent employment after years of job-hopping.
Synonyms: eternal, everlasting, unending, continuous.
Antonyms: temporary, fleeting, momentary, brief.
Meanings of other given options:
· (b) Extreme: Intense or severe (तीव्र)
· (c) Brief: Short in time or length (संक्षिप्त)
· (d) Huge: Very large in size (विशाल)