Which of the following represents the electronic configuration of a transition element?
- A$1s^2, 2s^2 2p^6 \dots ns^2 np^3$
- B$1s^2, 2s^2 2p^6 \dots (n-1)d^{1-10} ns^{1-2}$
- C$1s^2, 2s^2 2p^6 \dots ns^2 np^6 d^{10}, (n+1)s^2 p^1$
- D$1s^2, 2s^2 2p^6 \dots ns^2 np^6$
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