Which of the following aircraft types is categorized as a fighter jet?

The Gloster Meteor is categorized as a fighter jet because it was specifically designed and built for air combat roles. Originally introduced during World War II, it served as the United Kingdom's first jet fighter. Fighter jets are characterized by their speed, agility, and ability to engage in aerial combat, and the Meteor was developed with these capabilities in mind.

In contrast, the other aircraft listed are not classified as fighter jets because they are designed for different purposes. The Airbus A320 and Boeing 737 are commercial airliners intended for passenger transport. They prioritize fuel efficiency, capacity, and comfort rather than combat capabilities. The Lockheed C-130 is a military transport aircraft designed for airlift missions, cargo transport, and logistics support, which also does not align with the characteristics of a fighter jet. This context reinforces why the Gloster Meteor stands out as the only fighter jet among the options provided.