The youngest layer of secondary xylem in the wood of dicot plant is located

The anatomy of springwood shows some peculiar features. Identify the correct set of statements about springwood.

$(a)$ It is also called as the earlywood

$(b)$ In spring season cambium produces xylem elements with narrow vessels

$(c)$ It is lighter in colour

$(d)$ The springwood along with autumnwood shows alternate concentric rings forming annual rings

$(e)$ It has lower density

Choose the correct answer from the options given below:

Wood is a common name of

In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through