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Question

Which of the following orbitals described by three quantum numbers will have different energies for a multielectron atom, in the absence of external electric and magnetic fields?
(1) n = 1, l = 0, m = 0
(2) n = 2, l = 1, m = -1
(3) n = 2, l = 1, m = +1
(4) n = 3, l = 2, m = +1
(5) n = 3, l = 2, m = 0

A
4 and 5
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B
1 and 2
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C
2 and 3
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D
None of these
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