The angle between the tangents drawn from a point $(4,3)$ to the circle $x^2+y^2-2 x-4 y=0$ is

• A

  $\frac{\pi}{6}$
• B

  $\frac{\pi}{4}$
• C

  $\frac{\pi}{3}$
• Correct answer
  D

  $\frac{\pi}{2}$

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