If $x-2 y=0$ is a tangent drawn at a point P on the circle $x^2+y^2-6 x+2 y+c=0$, then the distance of the point $(6,3)$ from P is

• A

  $\sqrt{5}$
• Correct answer
  B

  $2 \sqrt{5}$
• C

  $4 \sqrt{5}$
• D

  $5 \sqrt{2}$

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