The statement A and B both are correct is at the same angle.
We have given the condition that will guarantee that line l is parallel to line m in the diagram.
What is the parallel line?
The parallel lines can be defined as two lines in the same plane that are at equal distance from each other and never meet.
The angle made by the parallel lines are
A. ∠a and ∠b are complementary.
B. ∠a and ∠b are congruent.
because they are opposite angles.
Therefore, statements A and B both are correct.
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