A boy of mass M is applying a horizontal force to slide a box of mass M' on a rough horizontal force to slide coefficient of friction between the shoes of the boy and the floor is `mu` and that between the box and the floor is `mu'`. In which of the following cases it is certainly not possible to slide the box?

Options

A. `mu lt mu, M lt M'`
B. `mu lt mu', M lt M'`
C. `mu lt mu', M gt M'`
D. `mu gt mu', M gt M'`

Answer

A