Select the most appropriate antonym of the highlighted word in the following sentence.
It is a common hypothesis that heavy taxes on cars can solve all the traffic congestions of a city.

Correct option is D

The correct antonym of the given word is (d) Fact.

Given word – Hypothesis:
Hypothesis means a proposed explanation or assumption made on the basis of limited evidence, used as a starting point for further investigation. It is a supposition, not a proven truth.
(Hindi meaning: परिकल्पना / अनुमान)
Example: The scientist put forward a hypothesis that was later tested in the lab.

Correct answer word – Fact:
Fact means something that is known to be true and can be verified. It is the direct opposite of an unproven hypothesis.
(Hindi meaning: तथ्य / सत्य)
Example: It is a fact that the earth revolves around the sun.

Synonyms of Hypothesis: assumption, theory, supposition, conjecture.
Antonyms of Hypothesis: fact, reality, certainty, truth.

Meanings of other options:

• (a) Delusion – A false belief not based on reality (भ्रम); this is closer in meaning to hypothesis, not its antonym.
• (b) Equivocation – The use of ambiguous language to conceal the truth (दोहरा अर्थ); unrelated to hypothesis.
• (c) Evasion – Avoiding something, especially a duty or responsibility (टालमटोल); unrelated to hypothesis.