Carbolic acid is [AFMC 2005]

• A. \[{{C}_{6}}{{H}_{5}}CHO\]
• B. \[{{C}_{6}}{{H}_{6}}\]
• C. \[{{C}_{6}}{{H}_{5}}COOH\]
• D. \[{{C}_{6}}{{H}_{5}}OH\]