Choose the most appropriate antonym of the highlighted word:
As children, I think things can be around you, but you really just retain the information that feels pertinent or important to you.

The correct answer is (c) Irrelevant.
Explanation:
The word "pertinent" means relevant or applicable to the matter at hand. The opposite of pertinent is "irrelevant," meaning not connected or not applicable to the matter at hand.
Meanings of other options:
· Related: Connected or associated with something.
· Apt: Appropriate or suitable in the circumstances.
· Proper: Correct or appropriate.
Correct sentence:
"The most appropriate antonym of 'pertinent' is irrelevant."