GKFix MCQ Question

Which of the following best describes Hund's rule of maximum multiplicity?

• A. Electrons fill orbitals starting with the lowest energy orbital available.
• B. Electrons must have opposite spins in the same orbital.
• C. Electrons will occupy degenerate orbitals singly before pairing up, with parallel spins.
• D. No two electrons can have the same set of four quantum numbers.