The Principle Quantum Number for the Electron in a Hydrogen

Multiple Choice

The principle quantum number for the electron in a hydrogen atom is n = 5. According to the quantum mechanical picture of the atom, what is the maximum possible value for the magnitude of the z-component of the angular momentum of the electron?

A) 3.17 × 10^-34 kg .m²/s
B) 4.22 × 10^-34 kg . m²/s
C) 1.99 × 10^-34 kg . m²/s
D) 1.06 × 10^-34 kg . m²/s
E) 2.11 × 10^-33 kg . m²/s