Emphysema, Hay fever and allergy are caused by

Options

A. Aerosols
B. Pollen
C. Iron dust
D. Cotton dust

Answer

**Step-by-Step Solution:**

1. **Understanding the Conditions**: First, let's define the conditions mentioned in the question:
- **Emphysema**: A lung condition that causes shortness of breath due to damage to the alveoli (air sacs) in the lungs.
- **Hay Fever**: An allergic reaction characterized by sneezing, runny or stuffy nose, often triggered by pollen.
- **Allergy**: A condition in which the immune system reacts abnormally to a foreign substance, which can include pollen.

2. **Analyzing the Options**: We are given four options to determine the cause of these conditions:
- **Aerosol**: Refers to tiny particles or droplets suspended in the air. While aerosols can transmit diseases, they are not directly linked to emphysema, hay fever, or allergies.
- **Pollen**: This is a fine powder produced by flowering plants. It is known to cause allergic reactions, hay fever, and can contribute to respiratory issues, including emphysema.
- **Iron Dust**: This is associated with a lung disease called siderosis, which is not related to the conditions mentioned.
- **Cotton Dust**: This can lead to a condition known as byssinosis, also unrelated to the conditions in question.

3. **Identifying the Correct Answer**: Based on the analysis:
- **Pollen** is the only option that is directly linked to causing emphysema, hay fever, and allergies.

4. **Conclusion**: Therefore, the correct answer is **pollen**.

**Final Answer**: Emphysema, hay fever, and allergy are caused by **pollen**.

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