Name the following compounds using cis-trans nomenclature.

• A. a. trans-1,4-dichlorocyclohexane
  b. trans-1,2-dichlorocyclohexane
• B. a. trans-1,4-dichlorocyclohexane
  b. cis-1,2-dichlorocyclohexane
• C. a. cis-1,4-dichlorocyclohexane
  b. trans-1,2-dichlorocyclohexane
• D. a. cis-1,4-dichlorocyclohexane
  b. cis-1,2-dichlorocyclohexane

Answer: (C)