JEE Main 2023 Mathematics question on Circles

Let the tangents at the points $A(4,-11)$ and $B(8,-5)$ on the circle $x^2 + y^2 - 3x + 10y - 15 = 0$, intersect at the point $C$. Then the radius of the circle, whose centre is $C$ and the line joining $A$ and $B$ is its tangent, is equal to