Which of the following sets of orbitals may degenerate

1.	Which of the following sets of orbitals may degenerate
A.	\[2s,\,2{{p}_{x}},\,2{{p}_{y}}\]
B.	\[3s,\,3{{p}_{x}},3{{d}_{xy}}\]
C.	\[1s,\,2s,\,3s\]
D.	\[2{{p}_{x}},\,2{{p}_{y}},\,2{{p}_{z}}\]
Answer» E.

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Which of the following sets of orbitals may degenerate

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