If `r_1a n dr_2`
are the radii of the smallest and the largest circles, respectively,
which pass though (5, 6) and touch the circle `(x-2)^2+y^2=4,`
then `r_1r_2`
is
`4/(41)`
(b) `(41)/4`
`5/(41)`
(d) `(41)/6`
A. `(4)/(41)`
B. `(41)/(4)`
C. `(5)/(41)`
D. `(41)/(6)`
