Which of the following is an anhydride?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acid-anhydrides-q3a.png"><img alt="The following is an anhydride - option a" class="alignnone size-full wp-image-224762" height="99" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acid-anhydrides-q3a.png" width="168"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acid-anhydrides-q3b.png"><img alt="The following is an anhydride - option b" class="alignnone size-full wp-image-224763" height="97" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acid-anhydrides-q3b.png" width="156"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acid-anhydrides-q3c.png"><img alt="The following is an anhydride - option c" class="alignnone size-full wp-image-224764" height="96" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acid-anhydrides-q3c.png" width="150"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acid-anhydrides-q3d.png"><img alt="The following is an anhydride - option d" class="alignnone size-full wp-image-224765" height="95" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-acid-anhydrides-q3d.png" width="160"/></a>