Select the most appropriate word for the given group of words.

A person incapable of making mistakes

Infallible

The most appropriate word for the given group of words is infallible.

• Infallible means incapable of making mistakes or being wrong.
• Pure means free from impurities or corruption.
• Optimist is a person who tends to expect the best outcome.
• Naive is a person who lacks experience or judgment.