The girth of the stem of a date palm increases due to the activity of:

In this organ,the vascular cambium is initially wavy and later becomes circular.

Grafting is attempted in those plants which show:

In dicot stem,the secondary growth takes place by

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:

In which of the following is anomalous secondary growth observed?