Oxidative decarboxylation of pyruvic acid results in the formation of
I. Acetyl CoA , II. `CO_(2)`
III. ATP , IV. `NADH+H^(+)`

Options

A. I only
B. I and II only
C. I, II and III only
D. I, II and IV only

Answer

### Step-by-Step Solution:

1. **Understanding Pyruvic Acid**: Pyruvic acid is the end product of glycolysis and is transported into the mitochondria for further processing.

2. **Oxidative Decarboxylation**: The process of oxidative decarboxylation involves the conversion of pyruvic acid into acetyl coenzyme A (acetyl CoA). This reaction is catalyzed by the pyruvate dehydrogenase complex, which consists of three enzymes.

3. **Enzymatic Action**: The three enzymes involved in this complex are:
- Pyruvate dehydrogenase
- Dihydrolipoyl transacetylase
- Dihydrolipoyl dehydrogenase

4. **Products of the Reaction**: During the oxidative decarboxylation of pyruvic acid, the following products are formed:
- **Acetyl CoA**: This is the main product that enters the Krebs cycle.
- **Carbon Dioxide (CO₂)**: This is released as a byproduct of the decarboxylation process.
- **NADH + H⁺**: NAD⁺ is reduced to NADH + H⁺ during this reaction, capturing high-energy electrons.

5. **ATP Production**: It is important to note that ATP is not produced during this specific reaction of oxidative decarboxylation of pyruvic acid.

6. **Conclusion**: The correct products formed from the oxidative decarboxylation of pyruvic acid are:
- Acetyl CoA (I)
- Carbon Dioxide (II)
- NADH + H⁺ (IV)

Thus, the correct answer includes options I, II, and IV.

### Final Answer:
The correct products formed from the oxidative decarboxylation of pyruvic acid are:
- I. Acetyl CoA
- II. CO₂
- IV. NADH + H⁺