Question

ゲスト

答えは2番なんですがどうしてですか？教えてください

Answer 1

Ishigreen2

Any other :
Another implies only one other country
Other would take a plural noun here being countries not country
Other's is not plural but means country の

Any other means 何でも あと
That means comparing any one other country in the world, Japan produced the most. So this is the right answer.