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Which set of quantum numbers is not allowed?
An=2,l=1,m1=0,ms=+1/2
Bn=2,l=1,m1=-1,ms=+1/2
Cn=2,l=0,m1=0,ms=-1/2
n=2,l=2,m1=1,ms=-1/2
Correct Answer: D. n=2,l=2,m1=1,ms=-1/2
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