A non-uniform cylinder of mass m, length l and radius r has its centre of mass at a distance l/4 from the centre on the axis of the cylinder. The cylinder is kept in a liquid of uniform density ` rho `. The moment of inertia of the rod about the centre of mass is I. The angular acceleration of point A relative to point B just after the rod is released from the position as shown in the figure is:

Options

A. `(pirhogl^(2)r^(2))/(I)`
B. `(pirhogl^(2)r^(2))/(4I)`
C. `(pirhogl^(2)r^(2))/(2I)`
D. `(3pirhogl^(2)r^(2))/(4I)`

Answer

B