Which one of the following set of elements can be detected using sodium fusion extract ?

Options

A. Sulfur, Nitrogen, Phosphorous, Halogens
B. Phosphorous, Oxygen, Nitrogen, Halogens
C. Nitrogen, Phosphorous, Carbon, Sulfu
D. Halogens, Nitrogen, Oxygen, Sulfur

Answer

To solve the question regarding which set of elements can be detected using sodium fusion extract, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Sodium Fusion Extract**: Sodium fusion extract, also known as the Lassaigne's test, is used for the qualitative analysis of certain elements in organic compounds. It helps in detecting elements like nitrogen, sulfur, phosphorus, and halogens.

2. **Identifying the Elements Detected**: The elements that can be detected using sodium fusion extract include:
- **Halogens**: Chlorine, Bromine, Iodine
- **Nitrogen**
- **Phosphorus**
- **Sulfur**

3. **Analyzing the Options**: We need to check which option includes all the elements that can be detected by sodium fusion extract:
- **Option A**: Sulfur, Nitrogen, Phosphorus, Halogens
- **Option B**: Phosphorus, Oxygen, Nitrogen, Halogens
- **Option C**: Nitrogen, Phosphorus, Carbon, Sulfur
- **Option D**: Halogens, Nitrogen, Oxygen, Sulfur

4. **Evaluating Each Option**:
- **Option A**: Contains Sulfur, Nitrogen, Phosphorus, and Halogens. All these can be detected using sodium fusion extract.
- **Option B**: Contains Phosphorus, Oxygen, Nitrogen, and Halogens. Oxygen cannot be detected using sodium fusion extract.
- **Option C**: Contains Nitrogen, Phosphorus, Carbon, and Sulfur. Carbon cannot be detected using sodium fusion extract.
- **Option D**: Contains Halogens, Nitrogen, Oxygen, and Sulfur. Again, Oxygen cannot be detected using sodium fusion extract.

5. **Conclusion**: The only option that includes elements which can all be detected using sodium fusion extract is **Option A**: Sulfur, Nitrogen, Phosphorus, and Halogens.

### Final Answer:
**Option A: Sulfur, Nitrogen, Phosphorus, Halogens**