Which of the following is not the examples of E1CB reaction?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-elimination-reaction-q14a.png"><img alt="The following is not the examples of E1CB reaction - option a" class="alignnone size-full wp-image-224102" height="56" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-elimination-reaction-q14a.png" width="171"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-elimination-reaction-q14b.png"><img alt="The following is not the examples of E1CB reaction - option b" class="alignnone size-full wp-image-224103" height="60" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-elimination-reaction-q14b.png" width="178"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-elimination-reaction-q14c.png"><img alt="The following is not the examples of E1CB reaction - option c" class="alignnone size-full wp-image-224104" height="60" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-elimination-reaction-q14c.png" width="210"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-elimination-reaction-q14d.png"><img alt="The following is not the examples of E1CB reaction - option d" class="alignnone size-full wp-image-224105" height="60" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-elimination-reaction-q14d.png" width="181"/></a>