A mass \( m \) supported by a massless string wound around a unifor...

A mass \( m \) 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? (2014 Main)
(a) \( 2 g / 3 \)
(b) \( g / 2 \)
(c) \( 5 g / 6 \)
(d) \( g \)