Primary function of cell wall is A. Controlling volume B. Providing shape C. It's selective permeability D. Protection against bursting To me, all the given options seem correct except C. A and D are correct when the cell is placed in hypotonic solutions which makes the cell swell up and cell wall applies wall pressure antagonistic to turgor pressure to prevent cell bursting. B is also correct as cell wall acts as exoskeleton, so please tell me the most appropriate option.

* The primary function of a cell wall is B. providing shape. Cell wall provides the cell with both structural support and protection. Protection against bursting by osmosis is a secondary function, which is otherwise provided by the plasma membrane.

* Cell wall provides shape, rigidity, and turgidity to plant cells. Animal cells do not have cell walls because they have endoskeleton. The cell wall maintains cell shape, almost as if each cell has its own exoskeleton.