The correct option is A 4-formyl-2-oxocyclohexane-1-carboxylic acid
The IUPAC name for the following compound is 4-formyl-2-oxocyclohexane-1-carboxylic acid. Here the acyclic ring is directly attached to the carbon containing the functional group, the carbon atom of the functional group is not included in the parent name of the alicyclic ring.