Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem
$I.$ 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?
The cambial ring is generally
Meristematic tissue in vascular bundle is