Which of the following is not a type of angle on the basis of measurement?

 

For this question, we need to know the types of angles on the basis of their measurement. We know that when we use a tester and expand it till we get a 'L' shape, we make a right angle. 

If we expand it a little more, we get an angle more than right angle i.e. obtuse angle. 

And if we shrink it a little, we get an angle less than right angle i.e. acute angle.

 So, there are only three types of angles on the basis of their measurement. We get equal angles when we have two angles of equal measures, but that is not the case.
Hence, the correct answer is option D.