Answer:
∠2 and ∠4 are congruent
Explanation:
Looking at the picture, we can't confirm if ∠3 is a right angle or not because there's not enough info.
∠1 and ∠3 are not adjacent because they don't share a common side.
Since we don't know the measure of ∠2 and ∠4, we can't conclude whether they are supplementary or not.
∠2 and ∠4 are congruent because all vertically opposite angles are congruent angles.