Which of the following might be a sign of an allergic reaction?

• A. Difficulty breathing and swelling
• B. Difficulty in hearing
• C. Sudden clarity of vision
• D. Increased strength in limbs

Answer: (A)

A sign of an allergic reaction often manifests through physical symptoms such as difficulty breathing and swelling. This is commonly associated with anaphylaxis, a severe and potentially life-threatening allergic reaction. In this state, the body releases histamines and other chemicals that can cause the airways to narrow, leading to breathing difficulties. Swelling, particularly in the face, throat, and tongue, can also occur and further obstruct airflow, making it critical to recognize and treat these symptoms promptly.

The other options do not typically align with common allergic reactions. Difficulty in hearing, sudden clarity of vision, or increased strength in limbs are not symptoms associated with allergic responses and do not indicate an immediate threat to airway or breathing, as is the case with the correct response.