Chemical responsible for pungent smell and tear inducing property in onion is

Options

A. Alicin
B. Sinigrin
C. Diallyl sulfide
D. Santonin

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the chemical responsible for the pungent smell and tear-inducing property in onions.

2. **Analyzing the Options**: We have four options to consider:
- Allicin
- Sinegrin
- Diallyl sulfide
- Santonin

3. **Evaluating Each Option**:
- **Allicin**: This is an organosulfur compound found in garlic, not onions. Therefore, it is not the correct answer.
- **Sinegrin**: This is a glucosinolate found in plants of the Brassicaceae family, such as broccoli and sprouts. It is not associated with onions.
- **Diallyl sulfide**: This is also an organosulfur compound, but it is derived from garlic and is found in Allium plants, including onions (Allium cepa). This compound is known for its pungent smell and can induce tears.
- **Santonin**: This is a drug used for deworming and is not related to the properties of onions.

4. **Conclusion**: After evaluating all the options, the chemical responsible for the pungent smell and tear-inducing property in onions is **Diallyl sulfide**.

### Final Answer:
The chemical responsible for the pungent smell and tear-inducing property in onion is **Diallyl sulfide**.

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