Which carbocation is the most stable?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-reaction-intermediates-q1a.png"><img alt="Carbocation is the most stable - option a" class="alignnone size-full wp-image-224278" height="79" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-reaction-intermediates-q1a.png" width="163"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-reaction-intermediates-q1b.png"><img alt="Carbocation is the most stable - option b" class="alignnone size-full wp-image-224279" height="74" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-reaction-intermediates-q1b.png" width="167"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-reaction-intermediates-q1c.png"><img alt="Carbocation is the most stable - option c" class="alignnone size-full wp-image-224280" height="61" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-reaction-intermediates-q1c.png" width="167"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-reaction-intermediates-q1d.png"><img alt="Carbocation is the most stable - option d" class="alignnone size-full wp-image-224281" height="74" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-reaction-intermediates-q1d.png" width="163"/></a>