The energy band diagram of the MOS system when gate voltage is zero is:

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/vlsi-questions-answers-mos-threshold-voltage-q8a.png"><img alt="Energy band diagram of MOS system when gate voltage is zero - option a" class="alignnone size-full wp-image-162168" height="104" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/vlsi-questions-answers-mos-threshold-voltage-q8a.png" width="215"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/vlsi-questions-answers-mos-threshold-voltage-q8b.png"><img alt="Energy band diagram of MOS system when gate voltage is zero - option b" class="alignnone size-full wp-image-162169" height="126" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/vlsi-questions-answers-mos-threshold-voltage-q8b.png" width="215"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/vlsi-questions-answers-mos-threshold-voltage-q8c.png"><img alt="Energy band diagram of MOS system when gate voltage is zero - option c" class="alignnone size-full wp-image-162170" height="127" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/vlsi-questions-answers-mos-threshold-voltage-q8c.png" width="215"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/vlsi-questions-answers-mos-threshold-voltage-q8d.png"><img alt="Energy band diagram of MOS system when gate voltage is zero - option d" class="alignnone size-full wp-image-162171" height="147" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/vlsi-questions-answers-mos-threshold-voltage-q8d.png" width="225"/></a>