Which specie does not exist?

Options

A. `[BF_(6)]^(3-)`
B. `[AlF_(6))]^(3-)`
C. `[GaF_(6)]^(3-)`
D. `[InF_(6)]^(3-)`

Answer

A

Explanation

`BF_(3)` cannot more than one `F^(-)` ion due to non availability of vacant d-orbitals. This is because maximum covalency of boron is four