If all the nucleophilic substitution reactions at saturated carbon atoms in the above sequence of reactions follow \(\mathrm{S}_{\mathrm{N}} 2\) mechanism, then \(\underline{E}\) and \(\underline{E}\) will be respectively,

• A

  
  
• B

  
  
• C

  
  
• Correct answer
  D

  
  

Solution

Hint :

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