The correct option is
B Pigments
Chromatophore is a cell containing pigments and hence reflects light. Depending upon the distribution of these chromatophores and the pigments in them, an organism gets different colour patterns. Chromatophores are found in a large variety of organisms ranging from amphibians, reptiles, crustaceans to cyanobacteria. Chromatophores are termed as melanophores (black), xanthophores (yellow), leucophores (white), etc. depending upon the pigment colour.
So, the correct answer is 'Pigments'.