In which of the orbit of \( \mathrm{He}^{+} \), the angular momentum of the electron in \( h / 2...

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In which of the orbit of \( \mathrm{He}^{+} \), the angular momentum of the electron in \( h / 2 \pi \) ?
(A) First orbit
(B) Second orbit
(C) Third orbit
(D) Fourth orbit
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