Medium
The set of principal $(n)$,azimuthal $(l)$ and magnetic $(m_l)$ quantum numbers that is not allowed for the electron in $H$-atom is
- A$n=3, l=1, m_l=-1$
- B$n=3, l=0, m_l=0$
- C$n=2, l=1, m_l=0$
- D$n=2, l=2, m_l=-1$
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