in a Lewis structure, a double line represent two covalent bond. The correct option is D.
What is covalent bond?
A covalent bond is formed between the atoms of two different elements by mutual sharing of one or more pairs of electrons.
To form a covalent bond, one atom loses the electrons in its valence shell to become stable and called as donor. Another atom of different element gains the electrons from the first atom and become an acceptor.
They both share to be stable and from a stable compound. Bond can be single, double or triple. As, the bond increases, the strength of holding the atoms increases.
Thus, the correct option is D.
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