Which combination of an aldehyde and an alcohol most readily forms a hemiacetal with base catalysis?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acetals-q3a.png"><img alt="Combination of aldehyde &amp; alcohol readily form hemiacetal with base catalysis - option a" class="alignnone size-full wp-image-224678" height="69" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acetals-q3a.png" width="212"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acetals-q3b.png"><img alt="Combination of aldehyde &amp; alcohol readily form hemiacetal with base catalysis - option b" class="alignnone size-full wp-image-224679" height="71" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acetals-q3b.png" width="222"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acetals-q3c.png"><img alt="Combination of aldehyde &amp; alcohol readily form hemiacetal with base catalysis - option c" class="alignnone size-full wp-image-224680" height="66" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acetals-q3c.png" width="224"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acetals-q3d.png"><img alt="Combination of aldehyde &amp; alcohol readily form hemiacetal with base catalysis - option d" class="alignnone size-full wp-image-224681" height="74" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acetals-q3d.png" width="235"/></a>