If `tan(A-B)=1a n dsec(A+B)=2/(sqrt(3))` , then the smallest positive values of A and B, respectively, are `(25pi)/(24),(19pi)/(24)` (b) `(19pi)/(24),(25pi)/(24)` `(31pi)/(24),(31pi)/(24)` (d) `(13pi)/(24),(31pi)/(24)`