$I.$ Many xerophytic plants have thick cuticle on leaf epidermis and sunken stomata

$II.$ Some xerophytic plants have special photosynthetic pathway $(CAM)$ that enables their stomata close during day

$III.$ Opuntia has spines (modified leaves), photosynthetic phylloclade (stem)

$IV.$ All adaptations are genetically fixed in all organisms

Choose the combinations of correct option

• A

  $I, II, III$ and $IV$

• B

  $II$ and $III$

• C

  $II$ and $I$

• D

  $I, II$ and $III$