The electron affinity values of elements $A, B, C$ and $D$ are respectively $-135, -60, -200$ and $-348 \ kJ \ mol^{-1}$. The outer electronic configuration of element $B$ is
- A$3s^2 3p^5$
- B$3s^2 3p^4$
- C$3s^2 3p^3$
- D$3s^2 3p^2$
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