"Plausible" means something that is reasonable or believable. Its antonym would be a term that suggests the opposite of being believable or reasonable. "Unlikely" fits this definition as it means something that is not probable or expected, thus contrasting with "plausible." The other options—"Reasonable," "Believable," and "Credible"—are synonyms or closely related to the meaning of "plausible."
In the following question select the answer pair that expresses a relationship most similar to that expressed in the capitalised pair.
Insolen...
For three decades (A) the Americans had occupy (B) the favoured position in terms of its relations with Russia and China and the disintegration (C...
The noxious fumes made it hard to breathe.
The weather was mild and pleasant.
An ornament fastened to clothing with a hinged pin
Heart : Cardiology :: Insects : ?
Abjure
Choose the word opposite in meaning to the given word.
Harmony
Which of the following is an antonym of "diligent"?
Group of singers