Correct answer: A). The surface area volume ratio increases.
A cell is like a compartment where various types of chemical reaction occur, like any living thing it also grows and increases in size. The higher the volume of the cell the larger reactions can occur in the cell. It means that higher surface area will allow a large exchange of substances through the cell.
If the size of the cell is decreased, it means its surface area to volume ratio also decreases, but at unequal rates. The volume would decrease faster as compared to the surface area which will lead to an increase in the surface area to volume ratio.
Hence, as the cell size decrease, the surface area to volume ratio increases.