Step 1: Understanding the Concept
Chloroxylenol is the antiseptic present in Dettol and its IUPAC name is 4-chloro-3,5-dimethylphenol.
Step 2: Substituent Positions
The OH is at position 1, chlorine at position 4 and two methyl groups at positions 3 and 5.
Step 3: Compare the options
Option (A) has two bromine atoms, option (B) is a diol, and option (D) has bromine and one methyl.
Option (C) shows the OH with chlorine opposite to it and a methyl group on each side of chlorine.
Final Answer:
Structure (C) represents chloroxylenol.
\[ \boxed{\text{(C) }\text{Structure of 4-chloro-3,5-dimethylphenol}} \]