The end product of alcoholic fermentation is :

Options

A. A) ethanol or lactic acid
B. B) acetaldehyde
C. C) water and `CO_2`
D. D) pyruvic acid

Explanation

To answer the question about the end product of alcoholic fermentation, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Alcoholic Fermentation**:
- Alcoholic fermentation is a type of anaerobic respiration that occurs in the absence of oxygen. It is primarily carried out by yeast and some bacteria.

2. **Identifying the Process**:
- The process begins with glycolysis, where glucose is broken down into two molecules of pyruvate.

3. **Fermentation Stage**:
- After glycolysis, in the absence of oxygen, the pyruvate undergoes fermentation. This is where the conversion of pyruvate takes place.

4. **End Products**:
- During alcoholic fermentation, the pyruvate is converted into ethanol (ethyl alcohol) and carbon dioxide (CO2).
- The reaction can be summarized as:
- Pyruvate → Ethanol + CO2

5. **Conclusion**:
- Therefore, the main end product of alcoholic fermentation is ethanol. While lactic acid is produced in lactic acid fermentation, it is not the product of alcoholic fermentation.

6. **Final Answer**:
- The end product of alcoholic fermentation is **ethanol**.