What is the equation to circle which touches both the axes and has centre on the line $x+y=4$ ?

• A

  $x^2+y^2-4 x+4 y+4=0$
• Correct answer
  B

  $x^2+y^2-4 x-4 y+4=0$
• C

  $x^2+y^2+4 x-4 y-4=0$
• D

  $x^2+y^2+4 x+4 y-4=0$

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