The correct options are
A cereal products
B dairy products
C beverage products
Bread, buns, idli, dosa, etc are examples of fermentation in cereal products. Alcoholic beverages like beer, wine are also extracted from cereals by fermenting them, thus, they are examples of beverage products. The dairy products where fermentation is used are cheese and yogurt. Here, lactic acid fermentation is used to make them.
Plant products, such as vegetables and fruits, do not directly involve fermentation.