The correct option is B It is used to separate solid-solid homogenous mixture.
Chromatography is the technique used for the separation of those solutes that dissolve in the same solvent. The word chromatography was derived from a greek word 'kroma', which means colour.
In this technique, the rate of movement of the components is taken advantage of to separate them. The components are dissolved in a solvent and are made to move through an adsorbent solid. The component that is more soluble in the solvent, dissolves faster and gets separated faster in the medium.
The ink that we use has water as a solvent and a dye is dissolved in it.
Chromatography also allows food companies to test their products for contaminants that could lead to the spoilage of food. Food spoilage can result in health problems, so chromatography is a useful technique for the detection of components of food that causes spoilage.
This technique is not useful for the components of solid-solid type of mixtures.