Identify A,B and C in the given reaction of lactic acid fermentation and select the correct option.
Pyruvic acid `+Aoverset("Lactate dehydrogenase")underset(FMN,ZN^(2+))hArr B+C`

Options

A. `{:(A,B,C),(NADH,"Lactic acid"+CO_(2),NAD^(+)):}`
B. `{:(A,B,C),(NADH,"Lactic acid",NAD^(+)):}`
C. `{:(A,B,C),(NAD^(+),"Lactic acid",NADH):}`
D. `{:(A,B,C),(NAD^(+),"Lactic acid"+CO_(2),NADH):}`

Answer

To solve the question regarding the lactic acid fermentation reaction and identify A, B, and C, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Reaction**: The reaction involves the conversion of pyruvic acid under anaerobic conditions, where oxygen is limited or absent. This process is known as lactic acid fermentation.

2. **Identifying the Enzyme**: The enzyme involved in this reaction is lactate dehydrogenase. This enzyme catalyzes the reduction of pyruvic acid.

3. **Identifying A**: In the presence of lactate dehydrogenase, pyruvic acid is reduced, and a coenzyme is required for this reaction. The coenzyme that donates electrons in this process is NADH. Therefore, A is identified as **NADH**.

4. **Identifying B**: The product of the reaction when pyruvic acid is reduced is lactic acid. Therefore, B is identified as **lactic acid**.

5. **Identifying C**: During this reaction, NADH is oxidized to regenerate NAD+, which is essential for glycolysis to continue. Therefore, C is identified as **NAD+**.

### Final Identification:
- A = NADH
- B = Lactic Acid
- C = NAD+