Which fruit is richest source of riboflavin

Bael is the fruit that is the richest source of riboflavin.
It is fiber-rich, low-calorie fruit that provides some protein and very little fat. Bael fruit is an excellent source of riboflavin and also provides vitamin C, vitamin A and potassium.
Bael contains chemicals called tannins, flavonoids, and coumarins. These chemicals help to reduce swelling (inflammation). This might help treat asthma, diarrhea and other conditions. Also, some of these chemicals help to reduce blood sugar.