A student prepares four potato cylinders. Each cylinder is $30\,\text{mm}$ in length. The cylinders all have the same diameter. The potato cylinders are then put into sugar solutions with different concentrations. After one hour, the lengths of the cylinders are measured again. The results are shown in the table. Which sugar solution has a water potential nearest to that of the potato cells?
Biology 5090 · O Level · Diffusion and osmosis