This is the 15395th most frequent Russian word.
правильная
Correct; right; proper.
In this sentence, 'правильное' (correct) describes something that follows rules or standards, in this case, a solution to a problem.
Эта задача имеет правильное решение.
This problem has a correct solution.
Here, 'правильная' (proper) refers to something that is physically suitable or appropriate for health or social norms.
У неё правильная осанка.
She has proper posture.
In this context, 'правильную' (right) indicates something that is appropriate or effective for achieving a specific goal.