Which is/are correct for sodium atom in the ground state? (a) There is only one unpaired electro...

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Which is/are correct for sodium atom in the ground state?
(a) There is only one unpaired electron.
(b) There are five pairs of electrons.
(c) 6 electrons are of one spin and other 5 of opposite spin.
(d) There are ten electrons in the same spin.
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