Which of the following reactions does not release `CO_2` ?

Options

A. Alcohol fermentation
B. Aerobic respiration
C. Lactic acid fermentation
D. Amphibolic pathway

Answer

To determine which of the following reactions does not release CO2, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Reactions**: We need to analyze the four reactions mentioned:
- Alcohol Fermentation
- Aerobic Respiration
- Lactic Acid Fermentation
- Amphibolic Pathway

2. **Alcohol Fermentation**:
- This process involves the conversion of glucose into ethanol and carbon dioxide.
- During the conversion of pyruvate to ethanol, CO2 is released.
- **Conclusion**: Alcohol fermentation releases CO2.

3. **Aerobic Respiration**:
- This process includes glycolysis, the Krebs cycle, and the electron transport chain.
- The Krebs cycle, in particular, releases CO2 as a byproduct.
- **Conclusion**: Aerobic respiration releases CO2.

4. **Lactic Acid Fermentation**:
- This is an anaerobic process where glucose is converted into lactic acid without the presence of oxygen.
- In this reaction, pyruvate is converted directly into lactate, and no CO2 is released.
- **Conclusion**: Lactic acid fermentation does not release CO2.

5. **Amphibolic Pathway**:
- This pathway involves the breakdown of fats, carbohydrates, and proteins.
- When these substrates enter the Krebs cycle, CO2 is released during the cycle.
- **Conclusion**: The amphibolic pathway releases CO2.

### Final Answer:
The reaction that does not release CO2 is **Lactic Acid Fermentation**.