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The correct distribution of \( 3 d \) electrons in chromium for the complex \( \left[\operatorname{Cr}(\mathrm{CN})_{6}\right]^{3-} \) :
\( \mathrm{P} \)
(a) \( 3 d_{x y}^{1}, 3 d_{y z}^{1}, 3 d_{x z}^{1} \)
(b) \( 3 d_{x y}^{1}, 3 d_{y z}^{1}, 3 d_{z x}^{0} \)
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(c) \( 3 d_{x^{2}-y^{2}}^{1}, 3 d_{z^{2}}^{1}, 3 d_{x z}^{1} \)
(d) \( 3 d_{x y}^{1}, 3 d_{x^{2}-y^{2}}^{1}, 3 d_{y z}^{1} \)
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