Correct option is B
The correct antonym of the given word is (b) Assist.
Avert: To prevent or ward off an undesirable occurrence. (टालना, रोकना)
Example: She averted an accident by hitting the brakes quickly.
Assist: To help or support in achieving a goal. (मदद करना)
Example: The nurse assisted the doctor during the surgery.
Synonyms: Prevent, Avoid, Deter, Fend off
Antonyms: Aid, Help, Support, Facilitate
Meanings of all the other given options:
· a) Thwart: To hinder or prevent (बाधा डालना)
· c) Elude: To escape or avoid cleverly (बचना)
· d) Compensate: To make up for something (मुआवज़ा देना)