The correct option is
A Anthocyanin
A. Anthocyanins are also water-soluble pigments which are red, purple, or blue in colour depending on the pH (blueberry, raspberry etc).
B. Carotene is an orange or red crystalline pigment which is commonly found in the chromoplasts of plants and few plant-eating animals that forms vitamin A in the body.
C. Xanthophylls are a group of oxygen-containing yellow pigments responsible for giving colour to flowers, fruits, vegetables (corn, pepper), egg yolks, feathers and shells etc.
D. Chlorophyll is a green coloured pigment present in the green parts of the plant that helps in the process of photosynthesis by the sunlight.
So, the correct answer is 'Anthocyanin'.