A wittig reaction with an aldehyde gives

• A

  ketone compound
• B

  a long chain fatty acid
• Correct answer
  C

  olefin compound
• D

  epoxide

Solution

The witting reaction is a chemical reaction of an aldehyde or ketone with triphenyl phosphonium ylide to give an alkene and triphenyl phosphine oxide.

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