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Which one of the following sets of quantum numbers is not possible for a $4p$ electron?
- A$n = 4, l = 1, m = -1, s = +\frac{1}{2}$
- B$n = 4, l = 1, m = 0, s = +\frac{1}{2}$
- C$n = 4, l = 1, m = 2, s = +\frac{1}{2}$
- D$n = 4, l = 1, m = 1, s = -\frac{1}{2}$
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