The angle which is one fifth of its complement is:
A. 150B. 300C. 450D. 600

Let the angle be denoted by x. The complement of the angle is 90 - x.

According to the problem, the angle is one fifth of its complement: x = (1/5)(90 - x)

Now, solve for x:

Multiply both sides by 5 to eliminate the fraction: 5x = 90 - x

Add x to both sides: 5x + x = 90 6x = 90

Divide both sides by 6: x = 90 / 6 x = 15

Thus, the angle is 15 degrees.

So, the correct answer is not one of the options you provided (A. 150, B. 300, C. 450, D. 600). The correct answer is 15 degrees, which might have been a mistake in the options given.