A triangular block of mass M rests on a smooth surface as shown in figure. A cubical block of mass m rests on the inclined surface. If all surfaces are frictionless, the force that must be applied to M so as to keep m stationary relative to M is :

Options

A. Mg tan 30
B. mg tan 30
C. (M+m)g tan 30
D. (M+m)g cos 30