Study the following flow chart that shows curd formation from milk and select the correct option for A and B.
Curd is added as inoculum to the fresh milk
↓
LAB shows growth in milk
↓
Production of .... A ..... starts
↓
Coagulation and digestion of milk protein
↓
lmproved nutritional quality by increased ….. B….
A B
1. citric acid vitamin-B₁₂
2. lactic acid vitamin-B₁₂
3. lactic acid vitamin-C
4. citric acid vitamin-B₂

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answer is B.

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Detailed Solution

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, which also improves its nutritional quality by increasing vitamin B₁₂.

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	A	B
1.	citric acid	vitamin-B₁₂
2.	lactic acid	vitamin-B₁₂
3.	lactic acid	vitamin-C
4.	citric acid	vitamin-B₂