Aplasma membrane and a cell wall
are two names for the same thing
have the same structure and different functions
have different structures and the same function
have different structures and different functions

Have different structures and the same function.

Explanation:

Plasma membrane and cell wall have different structures and the same functions, because plasma membrane is a semipermeable membrane which have receptors it helps in cell to cell communication. On the other hand, cell wall is completely permeable membrane which does not have any receptors to communicate cell to cell.

Plasma membrane is made up of phospholipids and proteins, found in all types of cell and helps in protecting protoplasm. While cell wall is made up of cellulose found in the plant cell and protects the cell from external shock.

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