To accommodate the view that matter is made up to $5$ elements only, a scientist proposed the following hypothesis; that atoms can have a maximum principal quantum number $n _{\operatorname{man}}$ and no higher. Then, which of the following statements must be true ?

  • [KVPY 2021]
  • A

    $n _{\max }=1$, and electrons have spin

  • B

    $n _{\max }=2$, and electrons have spinless but nevertheless obey the Pauli Exclusion principle.

  • C

    $n_{\max }=3$, and electrons are spinless but nevertheless obey the Pauli Exclusion principle.

  • D

    $n_{\max }=4$, and electrons have spin

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Reason: The mass of ions varies with speed.

  • [AIIMS 1999]

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