Which group of colloid have highest cation exchange capacity by volume basis

Answer: Option B

Vermiculite is a group of colloids that have the highest cation exchange capacity by volume basis.
Vermiculite is a hydrous phyllosilicate mineral that undergoes significant expansion when heated. It is formed by the weathering or hydrothermal alteration of biotite or phlogopite. It helps to aerate the soil while simultaneously retaining water and nutrients.