A cell whose internal salt concentration is 0.3 /liter is placed in a solution having salt concentration 0.5/liter. The solution is _

Explanation

The correct answer is that the solution is hypertonic to the cell. A hypertonic solution has a higher concentration of solutes compared to the cell, leading to the movement of water out of the cell. In this scenario, the external solution has a salt concentration of 0.5/liter, which is higher than the cell's internal salt concentration of 0.3/liter, indicating that the solution is hypertonic. Options A and B are incorrect because isotonic and hypotonic solutions would both have different effects on the cell's water movement. Option D is incorrect because the correct answer is provided in the options.