Miso is a traditional Japanese food product that is made from fermented soya beans. The fermentation process involves using the fungus *Aspergillus oryzae* to ferment the soybeans along with other ingredients like salt and water. This results in a paste with a rich, savory flavor commonly used in soups, sauces, and other dishes.
Now, let's analyze the options:
- Option (1) Fermented mangoes is incorrect. Mangoes are not typically used in the production of miso.
- Option (3) Fermented grapes is incorrect. Grapes are not used to make miso.
- Option (4) Fermented cabbage is also incorrect. Cabbage is used in the making of other fermented products like sauerkraut, not miso.
Thus, the correct answer is Fermented Soya beans.