Which of the following aqueous solutions has the lowest freezing point?

Aqueous solutions exhibits properties that cannot be found in pure liquids called the colligative properties. These properties are being affected by the presence of solute particles in the solution. The properties are the boiling point elevation, freezing point depression, osmotic pressure elevation and vapor pressure lowering. These properties are directly related to the concentration of the solute. Thus, as the concentration increases, the value of the properties would as well increase. For the case of freezing point, the solution which would contain more solute particles or highest concentration would be the solution that will have the lowest freezing point.

Answer ozone (o3) is made of three atoms of oxygen, it is a molecule;