Select an appropriate Antonym of the word "FRIVOLOUS".

The correct answer is Option (2) - Essential

Explanation:

• Frivolous means not having any serious purpose or value; silly or trivial.
  → Example: He spends his money on frivolous things.

• Antonym: Something serious, meaningful, or important.
  Hence, “essential” (meaning important, necessary) is the correct opposite.

Why others are incorrect:

• Volatile →  means unstable or changeable, not the opposite of frivolous.

• Frugality →  means being economical or avoiding waste; unrelated in meaning.

• Invincible →  means impossible to defeat; again, not opposite in sense.

 Correct Pair:
Frivolous ↔ Essential