In a monocot leaf:

Large,empty,colourless cells of the adaxial epidermis along the veins of grass leaves are:

Bulliform cells in grass leaves show

In a vertical section of a dorsiventral leaf,the protoxylem in its midrib bundle:

The correct situation of mesophyll in an isobilateral grass leaf is shown by:

The epidermis in a dorsiventral leaf:
$(a)$ Covers both adaxial and abaxial surfaces
$(b)$ Is not covered by cuticle
$(c)$ Bears more stomata on the upper side
$(d)$ May even lack stomata on the upper side
Which of the above statements are correct?