The correct option is
A Tetrahedral
The molecular geometry shape of
BF−4 is , tetrahedral.
Boron has 3 valance electrons and each of the four flourides contributes one electron to each covalent bond. The overall negative charge of the molecule contributes another electron.
Thus overall we have 3+4+1=8 electrons BF−4 is given above figure.
![1051968_1113723_ans_c16ec6000fd44d7aad90c50fb7254437.bmp](https://search-static.byjusweb.com/question-images/toppr_ext/questions/1051968_1113723_ans_c16ec6000fd44d7aad90c50fb7254437.bmp)