Question

in which kind of solution is the concentration of solutes the same inside and outside of the cell?
isotonic
hypertonic
hypotonic
concentrated

Explanation:

In an isotonic solution, the solute - concentration is equal inside and outside the cell. A hypertonic solution has a higher solute - concentration outside the cell, a hypotonic solution has a lower solute - concentration outside the cell, and "concentrated" is a general term not specific to this balance.

Answer:

A. isotonic