Select the option that can be used as a one-word substitute for the given group of words.
An unpleasant mixture of loud sounds.

Correct option is D

The correct one-word substitute for the given phrase is (d) Cacophony.
Cacophony: It means a harsh or unpleasant mixture of loud sounds.
Cacophony in Hindi: कर्कश ध्वनि।
Example: The cacophony of traffic outside the house made it hard to concentrate.
Meanings of other options:
· Harmony: A pleasing combination of sounds.
· Hindi: मधुरता।
· Hegemony: Dominance or control by one group over another.
· Hindi: प्रभुत्व।
· Irony: The use of words to express the opposite of their literal meaning.
· Hindi: विडंबना।