A mass ' m ' is supported by a massless string wound around a uniform hollow cylinder of mass m and radius R . If the string does not slip on the cylinder , with what acceleration will the mass fall on release ?

Question

$(a)\;\large\frac{2g}{3}\qquad(b)\;\large\frac{g}{2}\qquad(c)\;\large\frac{5g}{6}\qquad(d)\;g$