What is the complementary angle of 57 degrees?

The correct option is D 33 degrees
When the sum of two angles is equal to 90 degrees, they are called complementary angles.

So, let $x$ be the complementary angle of ${57}^{\circ }$.

$\angle x+{57}^{\circ }={90}^{\circ }$

$\angle x={90}^{\circ }-{57}^{\circ }$

$\angle x={33}^{\circ }$

Hence, 33 degrees is the correct answer.