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The transition elements have a characteristic electronic configuration which can be represented as:
(A) \( (n-2) s^{2} p^{6} d^{1-10}(n-1) s^{2} p^{6} n s^{2} \)
(B) \( (n-2) s^{2} p^{6} d^{1-10}(n-1) s^{2} p^{6} d^{1 \text { or } 2} n s^{1} \)
(C) \( (n-1) s^{2} p^{6} d^{10} n s^{2} n p^{6} n d^{1-10} \)
(D) \( (n-1) s^{2} p^{6} d^{1-10} n s^{1 \text { or } 2} \)
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