Which of the following is known as wood?

In dicot roots,after two or three years of secondary growth,the cortex is:

Identify the correct statement$(s)$ regarding lenticels.

During secondary growth of plants,stem phellogen cuts off cells on both sides. The outer cells get differentiated into ...$A$... and the inner cells get differentiated into ...$B$... cortex.
Choose the correct combination of $A$ and $B$ with reference to the above statement.

In roots,the pericycle gives rise to:

Each annual growth ring has