Filtration is a method to separate the components of a

The correct option is B

The mixture of a liquid and an insoluble substance.

The explanation for the correct answer:

Option B: The mixture of a liquid and an insoluble substance.

1. In the filtration process, solids is being separated from a liquid or gases using the filter.
2. The substance that passes through the filter is called the filtrate.

The explanation for the incorrect answer:

Option A: Solution

1. Components of a solution can be separated by various methods depending upon the type of solute and solvent.

Option D: Pure Substance:

1. A pure substance is composed of single matter so it cannot be separated.

So, Option B is correct. Filtration is a method to separate the components of a mixture of a liquid and an insoluble substance.