The line $x-2=0$ cuts the circle $x^2+y^2-8x-2y+8=0$ at $A$ and $B$. The equation of the circle passing through the points $A$ and $B$ and having the least radius is

  • A
    $x^2+y^2-4x+2y-1=0$
  • B
    $x^2+y^2-4x-2y=0$
  • C
    $x^2+y^2-4x-2y+1=0$
  • D
    $x^2+y^2-4x+4y=0$

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