I assume you're talking about 'Country with the sparsest (least dense) territory in Oceania'. That one's a bit tricky because no, Indonesia isn't in Oceania, but its territory on New Guinea (Western New Guinea) is considered to be in Oceania and qualifies through that.
Nice quiz. However on the question "first national capital alphabetically" it has Amsterdam first, and Ankara second. I believe it should be Abu Dhabi first, and Abuja second.