Kvass is obtained from _____________
(a) Rice
(b) Cabbage
(c) Tomato
(d) Old bread
This question was posed to me in an international level competition.
This interesting question is from Fermenting Sour Tonic Beverages topic in chapter Fermenting Vegetables & Milk, Fermenting Sour Tonic Beverages, Non-Food Applications of Fermentation of Fermentation Technology