Yeah, France would be the correct answer for that question. Yes, the northern part is in Europe, but the part of Colombia at 15 degrees north is in North America, so it doesn't matter that it's in a different continent. I would recommend changing the clue to say "Is South American".
I'd suggest changing the wording of "with four letters in its name" to "four letters long." Canada would be the clear winner by the other interpretation.
Canada and Denmark bith have four letters in their names and are a lot further North than Iran. Did you mean only four letters? Even so, Canada might count! {A,C,D and N).
My first guess for the South America question was Guyana, since I thought of Colombia's San Andrés y Providencia state and Venezuela's Nueva Esparta state and Federal Dependencies of Venezuela.
So I believe the answer should've been Guyana.