The equation of the normal drawn at the point $(\sqrt{2}+1,-1)$ to the ellipse $x^2+2 y^2-2 x+8 y+5=0$ is

• A

  $x+y=\sqrt{2}$
• B

  $x-2 y=3+\sqrt{2}$
• Correct answer
  C

  $\sqrt{2} x-y=3+\sqrt{2}$
• D

  $2 x+y=2 \sqrt{2}+1$

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