Which of the following reaction is not possible?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7a.png"><img alt="The following reaction is not possible at aliphatic chlorine atom - option a" class="alignnone size-full wp-image-224045" height="138" sizes="(max-width: 338px) 100vw, 338px" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7a.png 338w, https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7a-300x122.png 300w" width="338"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7b.png"><img alt="The following reaction is not possible at aliphatic chlorine atom - option b" class="alignnone size-full wp-image-224046" height="136" sizes="(max-width: 333px) 100vw, 333px" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7b.png 333w, https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7b-300x123.png 300w" width="333"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7c.png"><img alt="The following reaction is not possible at aliphatic chlorine atom - option c" class="alignnone size-full wp-image-224047" height="116" sizes="(max-width: 359px) 100vw, 359px" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7c.png 359w, https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7c-300x97.png 300w" width="359"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7d.png"><img alt="The following reaction is not possible at aliphatic chlorine atom - option d" class="alignnone size-full wp-image-224048" height="94" sizes="(max-width: 315px) 100vw, 315px" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7d.png 315w, https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-test-q7d-300x90.png 300w" width="315"/></a>