The dye from blue fountain pen can be separated by :

The correct option is B Chromatography
Fountain pen ink chromatography is when you use liquid and paper to separate out the components of another liquid, which in this case is fountain pen ink.

The reason this happens is that as the ink moves through the paper, the different dyes that are in it move at different speeds, which causes them to separate and become visible. The dye from the blue fountain pen can be separated by chromatography. so Option C is correct.