which of the following are Chromatophores?

Concept: Chromatophores are cells that produce color, of which many types are pigment-containing cells.

The green pigment present in plants is called the chloroplast. 

It is a pigment that provides the plants with their green colour. 

There are a number of different kinds of chromatophores. They are divided into the following groups based on their colour under white light: xanthophores (yellow), erythrophores (red), iridophores (reflective / iridescent), leucophores (white), melanophores (black/brown) and cyanophores (blue).

Hence, option 3 is correct.