Assertion(A) - `SF_4 and B F_4^(-)` have similar geometries.
Reason(R ) : Hybrid states assumed by S in `SF_4` and B in `BF_4^-` are different.
A. Both A and R true and R is the correct explanation of A
B. Both A and R true and R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true