Crystal violet
Aniline blue
Alizarin
Phenolphthalein
Answer is Wrong!
Answer is Right!
The correct answer is C. Alizarin.
Alizarin is a natural dye that is extracted from the roots of the madder plant. It is a red dye that has been used for centuries to color textiles, cosmetics, and other products. Alizarin is also used
in the manufacture of some pharmaceuticals.Crystal violet is a synthetic dye that is used as a stain in microscopy and as a disinfectant. Aniline blue is a synthetic dye that is used to color textiles
and paper. Phenolphthalein is a synthetic dye that is used as an indicator in chemistry.All of these dyes are used for different purposes, but only alizarin is a natural dye.