Medium
The $20^{th}$ electron of $Fe$ $(Z = 26)$ has which of the following sets of quantum numbers?
- A$3, 2, -2, -\frac{1}{2}$
- B$3, 2, 0, +\frac{1}{2}$
- C$4, 0, 0, +\frac{1}{2}$
- D$4, 1, -1, +\frac{1}{2}$
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