Oxygen can form a covalent (molecular) bond with nitrogen. Hence, option A is correct.
A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms.
Two covalent bonds form between the two oxygen atoms because oxygen requires two shared electrons to fill its outermost shell.
Nitrogen atoms will form three covalent bonds (also called triple covalent) between two atoms of nitrogen because each nitrogen atom needs three electrons to fill its outermost shell.
Hence, option A is correct.
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