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3. Which valence bond wavefunction for He is not a proper wavefunction because it violates the Pauli exclusion principle? (Please note: the numbers 1 and 2 represent the two electrons of He, N is the normalization constant, 1sA and 1Se represent the atomic orbitals, and a and B are spin wavefunctions.)
(A) φ(1,2) = N[1s_A(1)1s_B；(2)-1S_A(2)1s_B(1)][a(1)B(2)-a(2)B(1)]
(B)φ(1,2)=N[1s_A(1)1s_B(2)+1s_A(2)1s_B(1)][a(1)B(2)-a(2)B(1)]
(C) φ(1,2)=N[1s_A(1)1s_B(2)-1s_A(2)1S_B(1)][(1)β(2)+a(2)β(1)]
(D)φ(1,2)=N[1s_A(1)1s_B(2)-1s_A(2)1S_B(1)][a(1)a(2)]
(E)φ(1,2)=N[1s_A(1)1s_B(2)-1S_A(2)1S_B(1)][β(1)β(2)]