Let $R$ be a rectangle, $C$ be a circle, and $T$ be a triangle in the plane. The maximum possible number of points common to the perimeters of $R, C$ and $T$ is

• A

  $3$
• B

  $4$
• C

  $5$
• Correct answer
  D

  $6$

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