Select the option which means the same as the group of words given.

One who cannot be reformed or changed

incorrigible

The answer is incorrigible.

• Invincible means impossible to defeat or overcome.
• Infallible means incapable of making mistakes.
• Indelible means impossible to remove or erase.

The word incorrigible is the best fit for the given group of words because it refers to a person who cannot be corrected or changed.