A uniform rod of mass `m` and length `l` is applied pivoted at point `O`. The rod is initially in vertical position and touching a block of mass `M` which is at rest on a horizontal surface. The rod is given a slight jerk and it starts rotating about point `O` this causes the block to move forward as shown The rod loses contact with the block at `theta=30^(@)` all surfaces are smooth now answer the following questions.
Q. The value of ratio `M//m` is a) 2:3 b) 3:2 c) 4:3 d) 3:4

Options

A. `2 : 3`
B. `3 : 2`
C. `4 : 3`
D. `3 : 4`

Answer

C