Chemicals present in middle lamella

Match the following layers of the cell wall with their components:

Column I (Layer) Column II (Component)

i). Cellulose a. Middle lamella

ii). Pectin b. Secondary cell wall

iii). Lignin c. Primary cell wall

Lignin and cellulose present in xylem vessels shows affinity for water due to

Element present in middle lamella

Element present in middle lamella is