A saturated solution of silver benzoate, `C_(6)H_(5)CO_(2)Ag` has a pH of 8.63, `K_(a)` for benzoic acid is `6.5xx10^(-5)`. Estimate the value of `K_(sp)` of silver benzonate :
A. `1.49xx10^(-3)`
B. `1.399xx10^(-2)`
C. `1.287xx10^(-2)`
D. None of these