The reaction of 1-bromo-3-chlorocyclobutane with metallic sodium in dioxane under reflux conditions gives

• A

  
• B

  
• C

  
• Correct answer
  D

  

Solution

This is Wurtz reaction. Bromides have high reactivity than chlorides in Wurtz reaction therefore, reaction occurs from Br atoms,

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