Assertion :The dough, which is used for making foods such as dosa and idli is fermented by bacteria.
Reason : Micro-organism such as Lactobacillus grow in milk and convert it to curd.

The assertion(R) and reason(R) both are true but reason is not the correct explanation of assertion .

The correct answer is Option (1) – The assertion(R) and reason(R) both are true but reason is not the correct explanation of assertion .

The assertion is that the dough used for making foods such as dosa and idli is fermented by bacteria. This statement is true. The fermentation process involves the action of microorganisms, often bacteria or yeast, which produce various byproducts, including carbon dioxide (CO₂).

The reason provided is that Micro-organism such as Lactobacillus grow in milk and convert it to curd. This statement is also true. Micro-organisms such as Lactobacillus and others commonly called lactic acid bacteria (LAB) grow in milk and convert it to curd. During growth, the LAB produce acids that coagulate and partially digest the milk proteins. A small amount of curd added to the fresh milk as inoculum or starter contain millions of LAB, which at suitable temperatures multiply, thus converting milk to curd, which also improves its nutritional quality by increasing vitamin B₁₂. In our stomach too, the LAB play very beneficial role in checking disease- causing microbes