If $\theta$ is the angle between the tangents drawn from the point $(-1,-1)$ to the circle $x^2+y^2-4 x-6 y+c=0$ and $\cos \theta=-\frac{7}{25}$, then the radius of the circle is

• Correct answer
  A

  $4$
• B

  $1$
• C

  $2$
• D

  $3$

Hence, the correct answer is option: 'A'.