Variation of load angle delta, after sudden loading of an unloaded synchronous motor with no damping is?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-interview-questions-answers-freshers-q3a.png"><img alt="Variation of load angle delta of unloaded synchronous motor with no damping - option a" class="alignnone size-full wp-image-160957" height="188" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-interview-questions-answers-freshers-q3a.png" width="300"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-interview-questions-answers-freshers-q3b.png"><img alt="Variation of load angle delta of unloaded synchronous motor with no damping - option b" class="alignnone size-full wp-image-160958" height="174" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-interview-questions-answers-freshers-q3b.png" width="300"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-interview-questions-answers-freshers-q3c.png"><img alt="Variation of load angle delta of unloaded synchronous motor with no damping - option c" class="alignnone size-full wp-image-160959" height="197" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-interview-questions-answers-freshers-q3c.png" width="300"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-interview-questions-answers-freshers-q3d.png"><img alt="Variation of load angle delta of unloaded synchronous motor with no damping - option d" class="alignnone size-full wp-image-160960" height="181" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-interview-questions-answers-freshers-q3d.png" width="300"/></a>