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If the circles `x^2+y^2-16x-20y+164=r^2` and `(x-4)^2+(y-7)^2=36` intersect at two points then (a) `1ltrlt11` (b) `r=11` (c) `rgt11` (d) `0ltrlt1`
A. `0 lt r lt 1`
B. `1 lt r lt 11`
C. `r lt 11`
D. `r=11`

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