Not only is Wellington and New Zealand spelled incorrectly, but you are wrong about Manukau and Waitakere. They are no longer their own cities, as in 2010 they were merged into the Auckland super city. Thus, you should change your quiz to have the answers in the order of Auckland, Wellington, Christchurch, Hamilton, and Napier/Hastings. Thank you for taking in my comment and maybe consider doing more research before you make quizzes. However, if you are planning a holiday to New Zealand, I recommend a stop by the wonderful tourist attraction of Gore.
Also, either do city proper, or urban area. They're mixed here. If it's city proper, which seems to be the predominate way you've listed these, then the Mexico City suburb of Ecatepec should be listed.
The cities for New Zealand are wrong. Manukau and Waitakere are parts of the Auckland Urban Area that had their own city councils many years ago but now don't.
Also, I had to deliberately misspell Medellín and Wellington.
Also, either do city proper, or urban area. They're mixed here. If it's city proper, which seems to be the predominate way you've listed these, then the Mexico City suburb of Ecatepec should be listed.
Where are Merida, Tijuana, Ecatepec, AguasCalientes, Cancun??? Please change this. Check your research once again.
And also, why Manukau and Waitakere??? These cities don't exist now.
Where are Palmerston North, Hastings, Hamilton, Tauranga, Dunedin, Napier, etc.? Any two of them should be accepted instead of Manukau and Waitakere.
By the way, a good quiz. Just make these changes.