Endosmosis occurs when
The cell is placed in a hypertonic solution
The cell is placed in an isotonic solution
The cell is placed in a hypotonic solution
All of these
When a cell is placed in hypotonic solution, water from the hypotonic solution will move inside the cell because of the higher concentration of cell sap. The cell will increase in its volume. This is called endosmosis.
Hence, the correct answer is option c.