What is the gyromagnetic ratio? Give its magnitude for an electron.

An electron of charge $e$ and mass $m$ is moving in a circular path of radius $r$ with a uniform angular speed $\omega$. Which of the following statements are correct?

The ratio of the magnetic dipole moment to the angular momentum of the electron in the $1^{st}$ orbit of a hydrogen atom is

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

$A$ model for quantized motion of an electron in a uniform magnetic field $B$ states that the flux passing through the orbit of the electron is $n(h / e)$ where $n$ is an integer,$h$ is Planck's constant and $e$ is the magnitude of electron's charge. According to the model,the magnetic moment of an electron in its lowest energy state will be ($m$ is the mass of the electron).