Question

Assertion : Dust particles when come in contact with respiratory tract lead to sneezing, running nose, redness of eyes etc.

Reason : Allergic disorders are caused due to release of histamine.

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true but R is not correct explanation of A
• C. A is true but R is false
• D. A and R are false

Answer 1

The correct option is A Both A and R are true and R is the correct explanation of A

Dust particles may cause allergic reaction leading to sneezing, redness of eyes and irritation. The mechanism involves immunoglobulin E antibodies (IgE) binding to an allergen and then to a receptor on mast cells or basophils where it triggers the release of inflammatory chemicals such as histamine.