Which one of the following zone breaks can be correct regarded as valid for calculations?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-refrigeration-systems-q1.png"><img alt="The zone breaks can be correct regarded as valid for calculations - option a" class="alignnone size-full wp-image-248467" height="212" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-refrigeration-systems-q1.png" width="251"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-refrigeration-systems-q2b.png"><img alt="The zone breaks can be correct regarded as valid for calculations - option b" class="alignnone size-full wp-image-248468" height="231" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-refrigeration-systems-q2b.png" width="253"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-refrigeration-systems-q2c.png"><img alt="The zone breaks can be correct regarded as valid for calculations - option c" class="alignnone size-full wp-image-248473" height="234" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-refrigeration-systems-q2c.png" width="248"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-refrigeration-systems-q2d.png"><img alt="The zone breaks can be correct regarded as valid for calculations - option d" class="alignnone size-full wp-image-248469" height="234" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-refrigeration-systems-q2d.png" width="253"/></a>