(1) is true in respect of the Kingdom of the Netherlands, but not of the Country of the Netherlands; (2) The Canada-Greenland border has yet to be ratified.
If you're making a distinction between the Kingdom of the Netherlands and the Country of the Netherlands, you should add England (Scotland/Wales). Generally speaking, Jetpunk quizzes go by sovereign nations, not countries.
And the Federation of Bosnia and Herzegovina, which borders Croatia and Republika Srpska. And the Navajo Nation, which borders the USA-proper and the Hopi Reservation. And Cyprus, which borders the UK and the UN Buffer Zone. And I'm sure there are plenty of others.
Or, you could just stick to sovereign nations and not get into and endless argument of what *exactly* defines a country so that the quiz is doable without needing to guess how you defined it.
1. Netherlands borders 3 countries; Belgium, Germany and France (Saint Martin)
2. Denmark borders 2 countries; Germany and Canada (Hans Island)
Or, you could just stick to sovereign nations and not get into and endless argument of what *exactly* defines a country so that the quiz is doable without needing to guess how you defined it.