Which of the following are true statement for monocotyledonous leaf?

(i) Stomata are present on both the surfaces of the epidermis.

(ii) Mesophyll is not differentiated into palisade and spongy parenchyma.

(iii) In grasses, certain abaxial epidermal cells along the veins modify themselves into bulliform cells.

(iv) When the bulliform cells in the leaves have loss water, the leaf surface is exposed but when they absorbed water make the leaves curl inwards to minimize water loss.

(v) The size of the vascular bundles are dependent on the size of the veins.