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The coordination number, oxidation numbe...

The coordination number, oxidation number and the number of d-electrons in the metal ion of the complex `[CoCl_2(en)_2]Cl` are respectively (atomic number of Co = 27)

A

4,3 and 6

B

6,2 and 6

C

6,6 and 3

D

6, 3 and 6

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