Choose the correct statement with respect to monocot (isobilateral) leaf. 

• A

  Stomata are almost unequally distributed in both upper and lower epidermis.

• B

  Mesophyll is homogenous and not differentiated into upper palisade and lower spongy tissue. Cells of mesophyll are isodiametric with intercellular spaces. 

• C

  Vascular bundles are of different sizes and placed not at equal distance.

• D

  Vascular bundles are conjoint collateral and open.