Select the most appropriate synonym of the given word.
The speaker’s monotonous voice lulled the audience to sleep.

Correct option is B

The correct synonym of the given word is (b) Dull.
Monotonous: lacking in variety, dull, and repetitive. (Hindi: नीरस / एकरस)
Example: The lecture was so monotonous that many students started yawning.
Dull: lacking interest or excitement. (Hindi: उबाऊ / नीरस)
Example: His voice was too dull to keep the audience engaged.
Synonyms: boring, dull, tedious, repetitive.
Antonyms: exciting, interesting, engaging.
Meanings of other options:
· (a) Exciting – thrilling, interesting (रोमांचक)
· (c) Varied – showing diversity (विविध)
· (d) Interesting – engaging, capturing attention (दिलचस्प)