Antonyms

Sardonic means mocking or cynical in tone, while ironical also refers to saying something contrary to what is meant. Both convey a sense of mockery or insincerity, making them the pair with the closest meaning. The other options pair unrelated words.

Rubicund means having a healthy red color, while pallid means pale or lacking color. These are clear opposites describing complexion, making A-B the correct answer as claimed. The other words (Griandiose likely a typo for Grandiose, and Capricious meaning unpredictable) do not form clear pairs.

The claimed correct answer is C (A-C: Tenacious-Fragile), but option C as labeled pairs A-C. Tenacious means persistent or tough, while fragile means delicate or easily broken. These are clear antonyms describing strength/durability. The other words (Tedious: boring, Sordid: dirty) don't form clear pairs.

The claimed correct answer is C (B-C: Gainsay-Contradict). Gainsay means to contradict or oppose, making it a synonym of contradict. This is correct. The other words (Gleam: shine, Seize: grab) don't form same/opposite meaning pairs.

Obsession refers to an intense, overwhelming fixation or consuming interest in something. Its opposite would be a complete lack of interest or concern - which is precisely what indifference means. 'Whim' and 'delusion' are unrelated concepts, while 'addiction' is similar to obsession rather than opposite.

Nebulous means vague, unclear, hazy, or ill-defined - something that lacks definite form or clarity. Its opposite would be something clear, distinct, and well-defined. 'Starry' relates to celestial bodies, 'porous' refers to materials with holes, and 'fundamental' means basic - none are true opposites.

Corroborate means to confirm, support, or strengthen with additional evidence - to back up a claim or statement. Its opposite would be to contradict or deny - to state that something is incorrect. 'Establish' and 'substantiate' are similar to corroborate, while 'confirm' is a synonym.

Exuberant means energetic, enthusiastic, lively, or overflowing with excitement and vitality. Its opposite would be apathetic - showing no interest, enthusiasm, or concern. 'Admiring' and 'fervent' are positive/enthusiastic traits, while 'enchanting' means charming - none are opposites of exuberant.

Ingenious means clever, original, inventive, or showing creativity and skill. Its opposite would be unimaginative - lacking creativity, originality, or inventive thinking. 'Unfamiliar' and 'inconvenient' are unrelated concepts, while 'innovative' is actually a synonym of ingenious.

Distend means to swell, expand, or stretch out. The opposite would be to shrink, contract, or reduce in size. 'Expand' is a synonym, not an antonym. 'Shrink' correctly represents the opposite meaning.

Distinguish means to recognize differences between things, to tell apart, or to make notable. The opposite would be to confuse, mix up, or fail to see differences. 'Confuse' correctly represents this opposite meaning. 'Segregate' means to separate, which is related but not opposite.

Distrait means inattentive or absent-minded. The opposite is attentive, which describes someone who is fully focused and paying attention. Other options like careless, indifferent, and absent-minded are all similar in meaning to distrait, making them incorrect antonyms.