Answer: Option (B) is the correct answer.
Step-by-step explanation:
A molecular compound is defined as the compound in which combining atoms are chemically combined together by sharing of electrons.
This means a covalent bond will be present between the atoms of a molecular compound.
And, a covalent bond is always formed by non-metals.
Therefore,
,
and
are all molecular compounds as all of them have a covalent bond.
But in
, a chemical bond is formed between a metal and a non-metal. Hence, it is not a molecular compound.
Thus, we can conclude that out of the given options
does not represent a molecular compound.