Oxidative decarboxylation occurs during formation of

Options

A. Citric acid and succinic acid
B. Citric acid and oxaloacetic acid
C. Acetyl CoA and succinyl CoA
D. Oxaloacetic acid and oxalosuccinic acid.

Answer

### Step-by-Step Solution:

1. **Understanding Oxidative Decarboxylation**:
- Oxidative decarboxylation is a biochemical process where a carboxyl group (-COOH) is removed from a molecule and released as carbon dioxide (CO2). This process is coupled with oxidation, meaning that electrons are transferred and energy is released.

2. **Identifying the Context**:
- This process occurs during the citric acid cycle (Krebs cycle), which is a key metabolic pathway that provides energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins.

3. **Analyzing the Options**:
- **Option A**: Citric acid and succinic acid
- **Option B**: Citric acid and oxaloacetic acid
- **Option C**: Acetyl-CoA and succinyl-CoA
- **Option D**: Oxaloacetic acid and oxalosuccinic acid

4. **Evaluating Each Option**:
- **Option A**: Citric acid and succinic acid are products of the citric acid cycle but are not formed directly through oxidative decarboxylation.
- **Option B**: Citric acid and oxaloacetic acid are also products of the cycle but do not involve oxidative decarboxylation directly.
- **Option C**: Acetyl-CoA is formed from pyruvate via oxidative decarboxylation by the enzyme pyruvate dehydrogenase. Succinyl-CoA is formed from alpha-ketoglutarate through oxidative decarboxylation by the enzyme alpha-ketoglutarate dehydrogenase.
- **Option D**: Oxaloacetic acid and oxalosuccinic acid are not products of oxidative decarboxylation.

5. **Conclusion**:
- The correct answer is **Option C: Acetyl-CoA and Succinyl-CoA**. These are the compounds formed through oxidative decarboxylation during the citric acid cycle.