Identify the phasor diagram for the zero voltage regulation from the below diagrams.

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-voltage-regulation-transformer-q8c.png"><img alt="The phasor diagram for the negative voltage regulation - option c" class="alignnone size-full wp-image-161174" height="300" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-voltage-regulation-transformer-q8c.png" width="197"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-voltage-regulation-transformer-q9d.png"><img alt="The phasor diagram for the zero voltage regulation - option d" class="alignnone size-full wp-image-161176" height="300" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-voltage-regulation-transformer-q9d.png" width="190"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-voltage-regulation-transformer-q8b.png"><img alt="The phasor diagram for the negative voltage regulation - option b" class="alignnone size-full wp-image-161172" height="300" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-voltage-regulation-transformer-q8b.png" width="207"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-voltage-regulation-transformer-q9d1.png"><img alt="The phasor diagram for the zero voltage regulation - option d" class="alignnone size-full wp-image-161177" height="300" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-voltage-regulation-transformer-q9d1.png" width="190"/></a>