The electronic configuration which obeys Hund's rule for the ground state of carbon atom is:

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Solution

The correct option is A
Electronic configuration of carbon is $1 s^{2} 2 s^{2} 2 p^{2}$ .

According to Hund's rule, all orbitals will be singly occupied before any is doubly occupied and all unpaired electrons must have the same spin. So correct electronic configuration of carbon is:

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