An emulsion is a colloidal solution formed by mixing:
two immiscible liquids
The explanation for the correct option:
Option (D)
An emulsion is a type of colloidal solution consisting of two or more immiscible liquids mixed wherein one of the liquids is the dispersed phase and the other is the dispersing medium. For example, milk is an emulsion in which two immiscible liquids one is liquid fat and the other is water.
Final answer: An emulsion is a colloidal solution formed by mixing two immiscible liquids i.e Option (D)