A phenol has a methyl group para to the OH group and a nitro group ortho to the OH group. The correct name is

A4-methyl-6-nitrophenol
B2-nitro-4-methylphenol
C2-methyl-4-nitrophenol
D4-methyl-2-nitrophenol

Answer: D

OH defines C-1. Nitro ortho can be C-2 or C-6; choosing C-2 gives locant set {2,4}, lower than {4,6}. Alphabetical order puts methyl before nitro. The name is 4-methyl-2-nitrophenol; 2-methyl-4-nitrophenol would swap the positions.

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