The equation of the plane which is bisecting the line segment joining the points $\mathrm{A}(2,3,4)$, $\mathrm{B}(-4,1,-2)$ and is perpendicular to it, is

• A

  $6 x+2 y+6 z-3=0$
• B

  $3 x-y-3 z+6=0$
• C

  $3 x+y+3 z-21=0$
• Correct answer
  D

  $3 x+y+3 z-2=0$

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