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Which of the following complexes shows six coordination number?
A. `[Zn(CN)_(4)]^(2-)`
B. `[Cr(H_(2)O)_(6)]^(3+)`
C. `[Cu(CN)_(4)]^(2-)`
D. `[Ni(NH_(3))_(4)]^(2+)`

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Best answer
Correct Answer - B
Co-ordination number is equal to total number of ligands in a complex.

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