Answer: Option (D) is the correct answer.
Explanation:
An atom which shares its electrons with other atoms results in the formation of a covalent bond. Whereas an atom which donates electrons to another atom results in the formation of an ionic bond.
A carbon atom has atomic number 6 and its electronic distribution is 2, 4. Therefore, it has 4 electrons in its valence shell and in order to complete its octet it shares its valence electrons with other atoms.
Therefore, carbon atom only forms covalent bonds. On the other hand, carbon atom forms double bonds with other atoms and not with electrons.
Thus, we can conclude that a carbon atom has a strong tendency to share electrons.
