Answer: Option (b) is the correct answer.
Step-by-step explanation:
In the given structure a benzene molecule, that is,
is attached. And, further an aldehyde group that is, CHO group is attached to the benzene molecule.
Hence, suffix "aldehyde" will be added to the name of this molecule.
Whereas a group with formula
is known as phenol.
Therefore, we can conclude that the name of this given compound is benzaldehyde.