What is the inner bark primarily composed of?

Bark $= .....................$

Identify the correct statements:
$A$. Lenticels are the lens-shaped openings permitting the exchange of gases.
$B$. Bark formed early in the season is called hard bark.
$C$. Bark is a technical term that refers to all tissues exterior to vascular cambium.
$D$. Bark refers to periderm and secondary phloem.
$E$. Phellogen is single-layered in thickness.
Choose the correct answer from the options given below:

Define the following terms:
$(i)$ Conjoint vascular bundles
$(ii)$ Secondary growth

Intrafascicular cambium is situated in

Growth rings $(annual\ rings)$ are formed by the activity of: