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In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields ? <br> (A) $n = 1, l =0, m =0$ <br> (B) $n = 2, l = 0, m = 0$ <br> (C) $n = 2, l = 1, m = 1 $<br> (D) $n = 3, l = 2, m = 1$ <br> (E) $n = 3, l = 2, m = 0 $


( A ) (B) and (C)
( B ) (A) and (B)
( C ) (D) and (E)
( D ) (C) and (D)

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