○=> Correct option :
[tex]\color{plum}\tt\bold{(C) \: complementary}[/tex]
○=> Steps to derive correct option :
When two angles sum up to 90° they are called complementary angles.
Since the sum of angle 1 and angle 2 = 90°, they will be called each other's complements.
Thus, the angle pair is called complementary angles.
▪︎Therefore, the correct option is (C) complementary
