Hi,
Why do we say "This is the right answer" but "The answer is correct"? Why is the difference between 'correct' and 'right' in this context? You can also say 'The answer is right' and 'This is the correct answer'.
In this context, there is really no difference between your two words. The grammar in your first sentence suggests that there is only one correct/right answer, but the grammar in your second sentence leaves open the possibility that there may be more than one right/correct answer.
Best wishes, Clive