The antonym of the word protagonist is ________.

The correct answer is:

B) antagonist

Explanation:

• A protagonist is the main or central character in a story (usually the hero).

• An antagonist is the character who opposes the protagonist (often the villain).

Why others are incorrect:

• Agnostic – someone unsure about religious beliefs

• Arsonist – a person who sets fires

• Anarchist – someone who opposes authority/government

So, the antonym of protagonist is antagonist