Determine the IUPAC names and the common names of the following:

• A. IUPAC names; Common names:
  (a) propan-2-ol; isopropyl alcohol
  (b) 2-methylpropan-1-ol; isobutyl alcohol
  (c) cyclobutanol; cyclobutyl alcohol
  (d) 2-methylpropan-2-ol; sec-butyl alcohol
  
• B. IUPAC names; Common names:
  (a) propan-2-ol; propyl alcohol
  (b) 2-methylpropan-1-ol; butyl alcohol
  (c) cyclobutanol; cyclobutyl alcohol
  (d) 2-methylpropan-2-ol; tert-butyl alcohol
  
• C. IUPAC names; Common names:
  (a) propan-2-ol; isopropyl alcohol
  (b) 2-methylpropan-1-ol; isobutyl alcohol
  (c) cyclobutanol; cyclobutyl alcohol
  (d) 2-methylpropan-2-ol; tert-butyl alcohol
  
• D. IUPAC names; Common names:
  (a) propan-2-ol; propyl alcohol
  (b) 2-methylpropan-1-ol; butyl alcohol
  (c) cyclobutanol; cyclobutyl alcohol
  (d) 2-methylpropan-2-ol; butyl alcohol
  

Answer: (C)