The space distribution of flux produced in a DC machine is?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-dc-machine-mmf-flux-density-q2a.png"><img alt="The space distribution of flux produced in a DC machine - option a" class="alignnone size-full wp-image-160809" height="215" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-dc-machine-mmf-flux-density-q2a.png" width="300"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-dc-machine-mmf-flux-density-q2b.png"><img alt="The space distribution of flux produced in a DC machine - option b" class="alignnone size-full wp-image-160810" height="194" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-dc-machine-mmf-flux-density-q2b.png" width="215"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-dc-machine-mmf-flux-density-q2c.png"><img alt="The space distribution of flux produced in a DC machine - option c" class="alignnone size-full wp-image-160811" height="170" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-dc-machine-mmf-flux-density-q2c.png" width="300"/></a>
• D. None of the mentioned