01 When can fermentation be considered beneficial?
Answer and explanation
Correct answer: D. When taste and digestibility improve
Explanation: Fermentation is a controlled biological process in which useful microorganisms change the food components. Proper fermentation may improve flavour, texture, digestibility, and sometimes the availability of nutrients; examples include curd, idli, dosa, and certain fermented beverages. Dust, spoilage, and burning indicate contamination or damage, not beneficial fermentation. Thus option D is correct.