Commercial cork is obtained from which of the following?

$A$ mature woody stem has a peripheral waterproof tissue with openings in the form of scars on its surface. These are:

In dicot stem,the secondary growth takes place by

Diffuse-porous wood is a characteristic feature of plants growing in .........

What is the inner bark primarily composed of?

Identify the meristems responsible for primary growth and secondary growth from the following list:
$I -$ Cork cambium,$II -$ Apical meristem,$III -$ Vascular cambium,$IV -$ Intercalary meristem,$V -$ Lateral meristem
Choose the correct option for primary growth and secondary growth respectively.