Correct Answer - C
Microorganisms such as Lactobacillus and others commonly called Lactic Acid Bacteria (LAB) grow it milk and convert into 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 temperature multiply, thus, converting milk to curd which also improves its nutritional quality by increasing vitamin-`B_(12)`.
Note In our stomach, the LAB play other options are not related with LAB bacteria beneficial role in checking disease causing microbes.
