The correct option is B (b)
Riboflavin (vitamin B2) is found in a variety of food sources. The most abundant sources of this vitamin are milk, milk products and liver. Other food sources of riboflavin are oysters, lean meat, green leafy vegetables, mushrooms, asparagus, broccoli, avocados, Brussels sprouts and salmon. Oily fish, such as mackerel, trout, eel, herring, and shad, have substantial levels of riboflavin, too. Yeast extract is considered to be exceptionally rich in vitamin B2. Cereals contain relatively low concentrations of flavins, but are important sources in those parts of the world where cereals constitute the staple diet.