Vascular cambium is a meristematic layer that cuts off
Primary xylem and primary phloem
Xylem vessels and xylem tracheids
Primary xylem and secondary xylem
Secondary xylem and secondary phloem
Identify the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem.
$I.$ Secondary cortex
$II.$ Autumn wood
$III.$ Secondary phloem
$IV.$ Phellem