The end product of carbohydrate metabolism is

Options

A. `CO_(2)` and `H_(2)O`
B. `NH_(3)` and `CO_(2)`
C. `NH_(3)` and `H_(2)O`
D. `CO_(2)`

Answer

### Step-by-Step Solution:

1. **Understanding Carbohydrate Metabolism**: The process of carbohydrate metabolism primarily involves the breakdown of carbohydrates (like starch and sugars) into simpler forms. The most common carbohydrate that is metabolized is glucose.

2. **Digestion of Carbohydrates**: Carbohydrates are digested in the small intestine, where they are broken down into glucose. This glucose is then absorbed into the bloodstream.

3. **Transport of Glucose**: Once in the bloodstream, glucose is transported to all cells of the body. This is crucial for cellular respiration, which is the process by which cells generate energy.

4. **Metabolism of Glucose**: Inside the cells, glucose undergoes a series of metabolic processes. The primary pathways include glycolysis, the Krebs cycle, and the electron transport chain (ETC).

5. **End Products of Metabolism**: The end products of glucose metabolism are:
- Carbon Dioxide (CO2)
- Water (H2O)
- Adenosine Triphosphate (ATP), which is the energy currency of the cell.

6. **Evaluating the Options**: Given the options:
- Carbon dioxide and water
- Ammonia and carbon dioxide
- Ammonia and water
- Only carbon dioxide

The correct answer must include the end products of carbohydrate metabolism. Since glucose metabolism results in carbon dioxide and water, the correct option is "Carbon dioxide and water".

### Final Answer:
The end product of carbohydrate metabolism is **carbon dioxide and water**.

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