Hence , Option B is correct. It is less than 90 degrees.
What is an Angle?
A figure which is formed by two rays or lines that shares a common endpoint is called an angle.
How To Solve:
Observe the given figure. A perfect Right Angle is in the shape "L"(or opposite/mirror L also). One can measure or construct it using a protractor.
If the L seems to be bent inwards , then its an acute angle and if the L is bent outwards, then it is an obtuse angle.
From the given figure it can be concluded that the angle formed is an acute angle and hence its is less than 90 degrees.
Learn more about Angles at:
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