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In SiF6^(2-) and SiCl6^(2-) , which o...

In ` SiF_6^(2-) ` and ` SiCl_6^(2-)` , which one is known and why ?

A

`SiF_(6)^(2-)` because of small size of F

B

`SiF_(6)^(2-)` because of large size of F

C

`SiCl_(6)^(2-)` because of small size of Cl

D

`SiCl_(6)^(2-)`because of large size of Cl

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