Select the most appropriate synonym of the highlighted word.

The hapless incident was a result of sheer negligence by the authorities.

What is the synonym of the word 'vigilant'?

Select the most appropriate synonym of the given word.

Probe

Select the most appropriate synonym of the given word.

Satiate

Select the most appropriate synonym of the given word.
Occlude

Select the option that can be used as a one-word substitute for the given group of words.

To walk aimlessly

Given below is a word, followed by three sentences which consist of that word. Identify the sentence(s) which best express(es) the meaning of the word. Choose option 5 ‘None of these’ if the word is not suitable in any of the sentences.

ALLUSION

A. There are lots of literary echoes and allusions in the novel, but they don't do anything for the tired texture of the prose.

B. He made some allusion to the years they lived apart.

C. The video game is designed to give the allusion that you are in control of an airplane.

Choose the word that means the same as the given word.

Nacreous