The set of quantum numbers if any for, n=2, l=2, $m_{1} = 0$ :

describes an electron in a 2s orbital

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describes one of the five orbitals of a similar type

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describes an electron in a 2p orbital

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is not allowed

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Solution

The correct option is D is not allowed
We have,
$f o r s p d f l = 0123 N o w n = 2 l = 2 \Rightarrow d$
but 2d\quad is not possible.

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