What Are the Possible Allowed Values of the Orbital Magnetic

Multiple Choice

What are the possible allowed values of the orbital magnetic quantum number m_ℓ of the electron?

A) 0 only
B) 0, ±1 only
C) any half-odd integer
D) 0, ±1, ±2, …, up to the maximum value for that orbit
E) It depends on the external magnetic field.