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Which of the following sets of quantum numbers is not allowed :
(1) n=1, l=0,m=0 s= +1/2
(2) n=1, l=1,m=0 s= -1/2
(3) n=2, l=1,m=1 s= +1/2
(4) n=2, l=1,m=0 s= -1/2
Ans: n=1, l=1,m=0 s= -1/2
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