A particle of charge $q$ and mass $m$ moves in a circular orbit with radius $r$ and angular speed $ \omega$. The ratio of the magnitude of magnetic moment to its angular momentum depends on

Question

$\begin {array} {1 1} (a)\;\omega\: and \: m & \quad (b)\;\omega \: and \: q \\ (c)\;m \: and \: q & \quad (d)\;\omega ,q\: and \; \: m \end {array}$