Kranz anatomy is one of the features of the leaves of 

• A

  ${\mathrm{C}}_3$ plants only.

• B

  ${\mathrm{C}}_4$ plants only.

• C

  ${\mathrm{C}}_4$ and CAM plants.

• D

   ${\mathrm{C}}_3 \mathrm{and} {\mathrm{C}}_4$plants.