Correct Answer:
D. Delightful
The word Odious means extremely unpleasant, repulsive, or deserving of hatred. Therefore, its antonym, a word with the opposite meaning, is Delightful, which means causing delight; charming or highly pleasing.
- Insignificant means too small or unimportant to be worth consideration, which is not the opposite of unpleasantness.
- Cacophony refers to a harsh, discordant mixture of sounds, which is unrelated to the emotional quality of 'odious'.
- Repulsive is actually a synonym of 'odious', meaning causing intense distaste or aversion, not an antonym.
Thus, 'delightful' perfectly captures the opposite sentiment of 'odious'.