In a multielectron atom, which of the following orbitals described by three quantum numbers will have same energy in absence of electric and magnetic fields?

A. $\mathrm{n}=1, \mathrm{l}=0, \mathrm{~m}_1=0$

B. $\mathrm{n}=2, \mathrm{l}=0, \mathrm{~m}_1=0$

C. $\mathrm{n}=2, \mathrm{I}=1, \mathrm{~m}_1=1$

D. $\mathrm{n}=3, \mathrm{l}=2, \mathrm{~m}_1=1$

E. $\mathrm{n}=3, \mathrm{l}=2, \mathrm{~m}_1=0$

Choose the correct answer from the options given below:

<p><style type="text/css"> .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-baqh{text-align:center;vertical-align:top} .tg .tg-0lax{text-align:left;vertical-align:top} </style> <table class="tg" style="undefined;table-layout: fixed; width: 330px"><colgroup> <col style="width: 225px"> <col style="width: 105px"> </colgroup> <thead> <tr> <th class="tg-0lax"></th> <th class="tg-baqh">orbital</th> </tr></thead> <tbody> <tr> <td class="tg-0lax">$\mathrm{A}: \mathrm{n}=1, \ell=0, \mathrm{~m}_{\ell}=0$</td> <td class="tg-0lax">1s</td> </tr> <tr> <td class="tg-0lax">$\mathrm{B}: \mathrm{n}=2, \ell=0, \mathrm{~m}_{\ell}=0$</td> <td class="tg-0lax">2s</td> </tr> <tr> <td class="tg-0lax">$\mathrm{C}: \mathrm{n}=3, \ell=1, \mathrm{~m}_{\ell}=1$</td> <td class="tg-0lax">3p</td> </tr> <tr> <td class="tg-0lax">$\mathrm{D}: \mathrm{n}=3, \ell=2, \mathrm{~m}_{\ell}=1$</td> <td class="tg-0lax">3d</td> </tr> <tr> <td class="tg-0lax">$\mathrm{E}: \mathrm{n}=3, \ell=2, \mathrm{~m}_{\ell}=0$</td> <td class="tg-0lax">3d</td> </tr> </tbody> </table></p> <p>In absence of electric and magnetic fields, all orbitals of 3d are degenerate</p>