Among the following mixtures, the solution is

Explanation:

A solution is a homogeneous mixture where one substance (solute) dissolves completely in another (solvent). Here's how the options compare:

1. Sand in water: Sand does not dissolve in water; it settles at the bottom, forming a heterogeneous mixture.
2. Chalk in water: Chalk also does not dissolve; it remains suspended or settles, making the mixture heterogeneous.
3. Sugar in water: Sugar dissolves completely in water, forming a homogeneous mixture, which qualifies as a solution.
4. Water in kerosene: Water and kerosene do not mix; they form two separate layers, so it is not a solution.

Final Answer

Thus, Sugar in water is the correct choice.