Which statement is true about ∠1 and ∠2?
a. ∠1 and ∠2 are congruent because they are pair of adjacent angles.
b. ∠1 and ∠2 are complementary because they are a pair of adjacent angles.
c. ∠1 and ∠2 are congruent because they are a pair of alternate interior angles.
d. ∠1 and ∠2 are complementary because they are pair of alternate interior angles
