(A) : If a body is trying to slip over a surface then friction acting on the body is necessarily equal to the limiting friction .
(R) : Static friction can be less than the limiting friction force .

Options

A. If both A and R are true and R is the correct explanation of A .
B. If both A and R are true but R is not correct explanation of A .
C. If A is true but R is false .
D. If A is false but R is true

Answer

D