What is the appropriate systematic name of each compound?

• A. (i): 2,3-dimethylhex-3-ene
  (ii): 2-methylcyclopent-1-ene
  (iii): 3-ethyl-4-methylcyclohex-1-ene
• B. (i): 4,5-dimethylhex-4-ene
  (ii): 3-methylcyclopent-1-ene
  (iii): 2-ethyl-3-methylcyclohexene
• C. (i): 2,3-dimethylhex-2-ene
  (ii): 3-methylcyclopent-1-ene
  (iii): 3-ethyl-4-methylcyclohex-1-ene
• D. (i): 4,5-dimethylhex-4-ene
  (ii): 2-methylcyclopentene
  (iii): 2-ethyl-3-methylcyclohexene

Answer: (C)