Correct Option: B

Middle lamella is mainly composed of calcium pectate. Calcium is deposited in plants cell walls during their formation - it is required for the stability and function of cell membranes and acts as a type of ‘cementing agent’ in the cell walls in the form of calcium pectate’. Calcium pectate is like a glue binding adjacent cells together so if inadequate calcium is not transported during cell formation, tissues become less stable and prone to disintegration.