The equation having the multiple root of the equation $x^4+4 x^3-16 x-16=0$ as its root is

• A

  $x^2+2 x-3=0$
• B

  $x^2-3 x+2=0$
• Correct answer
  C

  $x^2+x-2=0$
• D

  $x^2-4 x+3=0$

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