Explanation:

- The Australian Open is one of the four major Grand Slam tennis tournaments.

- Melbourne has been the traditional host city for the Australian Open for many years.

- Sydney, a major city in Australia, hosts various sporting events but is not the location for the Australian Open.

- Perth is known for hosting the Hopman Cup, a different tennis event.

- Canberra is the capital of Australia and hosts various events but not the Australian Open.

- Option 5, "None of the above," is incorrect as Melbourne is the right answer.