An electron in Bohr's hydrogen atom has an energy of \( -3.4 \mathr...

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An electron in Bohr's hydrogen atom has an energy of \( -3.4 \mathrm{eV} \). The angular momentum of the electron is
(A) \( \mathrm{h} / \pi \)
(B) \( \mathrm{h} / 2 \pi \)
\( \mathrm{P} \)
(C) \( \mathrm{nh} / 2 \pi \) ( \( \mathrm{n} \) is an integer)
(D) \( 2 \mathrm{~h} / \pi \)
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