The correct option is D (A) is not correct but (R) is correct.
Food colours are added to provide good colour to the food. They are generally added to packaged meat, chilli powder, turmeric, sweets, etc.
They can be natural or artifical. Tartrazine is a sunset-yellow coloured artificial colour whereas beetroot is a natural colour. An overconsumption of artificial food colour is detrimental to health. So, natural colours should be preferred over artifical colours and not vice-versa.