The correct option is C pure water or hypotonic solution
A cell is said to be plasmolysed when water moves out of the cell and the cell membrane of a plant cell shrinks away from its cell wall. This condition occurs when the cell is transferred from isotonic solution to hypertonic solution.
When a plasmolysed cell is kept in pure water or hypotonic solution (low concentration), the cell can be deplasmolysed.