Assertion: `SiF_(6)^(2-)` is known but `SiCl_(6)^(2-)` is not. Reason: Size of fluorine is small and its lone pair of electrons

Assertion: `SiF_(6)^(2-)` is known but `SiCl_(6)^(2-)` is not.
Reason: Size of fluorine is small and its lone pair of electrons intersects with d-orbitals of `Si` strongly.
A. If both assertion and reason are correct and reason is correct explanation for assertion.
B. If both assertion and reason are correct but reason is not correct explanation for assertion.
C. If assertion is correct but reason is incorrect.
D. If both assertion and reason are incorrect.

Assertion: `SiF_(6)^(2-)` is known but `SiCl_(6)^(2-)` is not. Reason: Size of fluorine is small and its lone pair of electrons intersects with d-orbi

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