The vacuoles in the cells are filled up with
Vacuoles are like storage bubbles which are found mostly in plant cells. They occupy most of the portion of plant cells. These are used for storage of food or water. They also store toxic metabolic by-products or end products of plant cells. Cell sap is the dilute fluid containing water, amino acids, glucose and salts. Vacuoles store the cell sap.
Protoplasm is a gel-like substance present in all cells. It is a colloid of water and the disperse particles present in them. These particles are proteins, lipids, carbohydrates.
Cell sap differs from protoplasm as it is the fluid present in vacuole bounded by tonoplast that is generally rich in by-products of metabolism or reserve materials which can be used by protoplasm.
Osmotic pressure and turgidity are maintained by vacuoles due to the presence of cell sap.
So, the correct answer is option B.