Which one of the following is the most energetic conformation of cyclohexane?

• A

  Boat
• B

  Twisted boat
• C

  Chair
• Correct answer
  D

  Half chair

Solution

" represents asymmetric carbon atom. No. of asymmetric carbon atom $=(n)=2$ $\therefore$ Total number of optical isomers $=2^{n}$ $$ =2^{2}=4 $$

Hence, the correct answer is option: 'D'.