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The coordination number of cation and an...

The coordination number of cation and anion in fluorite `CaF_(2)` and rutile `TiO_(2)` are respectively:

A

`8:4 and 6:3`

B

`6:3 and 4:4`

C

`6:6 and 8:8`

D

`4:2 and 2:4`

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