Which condition is described as a seasonal respiratory reaction to allergens such as pollen?

• A. Hypersensitivity and allergic reactions
• B. Hay fever
• C. Immunodeficiency diseases
• D. Autoimmune hemolytic anemia

Answer: (B)

Seasonal allergic rhinitis, commonly called hay fever, describes an IgE-mediated immune reaction to environmental pollen that happens at certain times of the year when pollen is present. It causes sneezing, nasal congestion, runny or itchy nose, and itchy, watery eyes, matching a seasonal respiratory response to pollen exposure. While the other options refer to broader or unrelated immune issues (general hypersensitivity, immune deficiencies, or autoimmune red cell destruction), they do not describe the specific seasonal respiratory reaction triggered by pollen, making hay fever the best fit.