Which ester will not give a good yield of the Claisen condensation product with NaOEt in EtOH?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-aptitude-test-q2a.png"><img alt="Ester will not give yield of Claisen condensation product with NaOEt in EtOH - option a" class="alignnone size-full wp-image-224811" height="64" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-aptitude-test-q2a.png" width="106"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-aptitude-test-q2b.png"><img alt="Ester will not give yield of Claisen condensation product with NaOEt in EtOH - option b" class="alignnone size-full wp-image-224812" height="63" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-aptitude-test-q2b.png" width="121"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-aptitude-test-q2c.png"><img alt="Ester will not give yield of Claisen condensation product with NaOEt in EtOH - option c" class="alignnone size-full wp-image-224813" height="61" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-aptitude-test-q2c.png" width="135"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-aptitude-test-q2d.png"><img alt="Ester will not give yield of Claisen condensation product with NaOEt in EtOH - option d" class="alignnone size-full wp-image-224814" height="64" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-aptitude-test-q2d.png" width="113"/></a>