4 valence electrons do the element carbon has. Hence, option C is correct.
What are valence electrons?
Valence electrons are the electrons in the outermost shell, or energy level, of an atom.
An electron in an atom's valence shell is a lone pair electron or an electron which is part of a covalent bond.
Atomic carbon has six electrons: two inner shells (core) electrons in the 1s orbital, and four valences (outermost shell) electrons in the 2s and 2p orbitals.
Hence, option C is correct.
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