AIIMS 2014 Chemistry IUPAC Naming MCQ Question

The correct answer is A) 4-methoxy-2-nitrobenzaldehyde because it accurately follows IUPAC naming conventions by indicating the substituents and their positions on the benzene ring. In this name, "4-methoxy" signifies a methoxy group at the fourth position, "2-nitro" indicates a nitro group at the second position, and "benzaldehyde" denotes the presence of an aldehyde functional group at the first carbon of the benzene ring, which is the highest priority functional group.