Which of the following aircraft examples is classified as a super aircraft?

The Antonov AN-225 is classified as a super aircraft due to its remarkable size and payload capacity, making it the largest cargo airplane in the world. It was originally designed to transport oversized cargo and has the ability to carry exceptionally heavy loads, including spacecraft and other large items. Its wingspan and overall dimensions surpass those of typical commercial aircraft, allowing it to handle vast amounts of freight, which distinguishes it within the category of super aircraft.

In contrast, the other aircraft listed, such as the Cessna 172, Airbus A320, and Boeing 737, do not fall under the "super" classification because they are smaller and designed for different purposes—general aviation and regional or medium-haul commercial flights. These aircraft have more conventional sizes and payload capabilities compared to the Antonov AN-225's extraordinary specifications.