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

Which useful product is derived from the epidermis (cork cambium/phellogen activity)?

Cambium is present in between

Duramen is present in

Read the different components from $(i)$ to $(iv)$ in the list given below and tell 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 $(ii)$ Wood $(iii)$ Secondary phloem $(iv)$ Phellem
The correct order is:

Each annual growth ring has