Secondary xylem and phloem in dicot stem are produced by
Axillary meristems
Apical meristems
Phellogen
Vascular cambium
Lenticels are found in
The vascular cambium normally gives rise to
$I.$ Protection of internal tissues
$II.$ Protection of leaves from microbes
$III.$ Gaseous exchange
$IV.$ Reduction in the rate of transpiration through epidermal cells due to trichomes
Which of the function of epidermis is/are relevant from the above given statements?
Aerating pores are present at places on the cork cambium. These are called