The most appropriate antonym of the word "fanatic" is "Tolerant," so Option 3 is the correct answer.

Here's a detailed explanation:

1. Extremist - While "extremist" and "fanatic" share some similarities in the sense that they both describe individuals with strong and often uncompromising beliefs, they are not direct opposites. Extremists can be fanatical about their beliefs, but being an extremist doesn't necessarily mean you lack tolerance.

2. Tolerant - "Tolerant" is the opposite of "fanatic" because it implies a willingness to accept and respect differing opinions, beliefs, or lifestyles. A fanatic, on the other hand, is someone who is excessively devoted to a particular cause or belief and is often unwilling to consider or accept alternative viewpoints.

3. Lunatic - "Lunatic" refers to someone who is mentally unstable or insane, which is not a direct antonym of "fanatic." They address different aspects of a person's characteristics - mental state versus intensity of belief.

4. Fantastic - "Fantastic" means something extraordinary or imaginative, and it's unrelated to the concept of fanaticism or tolerance. It's not an antonym for "fanatic."