A person shows strong unusual hypersensitive reaction when exposed to certain substance present in air.
Name the cells responsible for such reactions.

Explanation

To answer the question regarding the cells responsible for strong unusual hypersensitive reactions when exposed to certain substances in the air, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Reaction**: The question describes a person experiencing a hypersensitive reaction upon exposure to certain substances in the air. This type of reaction is commonly known as an allergy.

2. **Defining Allergy**: An allergy is a hypersensitive response of the immune system to foreign substances, which are referred to as allergens. These allergens can include various substances such as pollen, dust, animal fur, or certain foods.

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