The compound prepared by a substitution reaction of benzene is

• Correct answer
  A

  acetophenone
• B

  glyoxal
• C

  cyclohexane
• D

  hexabromo cyclohexane

Solution

Acetophenone can be prepared from benzene by its electrophilic substitution (Friedel-Craft acylation) reaction as follows

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