Which of the following are not true
a. Cork cambium is otherwise called phellogen
b. Cork is otherwise called phellem.
c. Secondary cortex is otherwise called periderm.
d. Cork cambium, cork and secondary cortex are collectively called phelloderm
Cork cambium is otherwise called phellogen is True. Cork is otherwise called Phellem is also True. The secondary cortex is otherwise called periderm is False, as the secondary cortex is otherwise called phelloderm, and cork, cork cambium, and secondary cortex together called Periderm.
The cork cambium, cork, and the secondary cortex are together called phelloderm. It is False because cork, cork cambium and secondary cortex together are called Periderm.
The correct option is C.