**Core Concept**
Allergic rhinitis is an immune-mediated disorder characterized by an exaggerated response to inhaled allergens, such as pollen, dust mites, or pet dander. This reaction involves the release of chemical mediators from mast cells, leading to symptoms like sneezing, runny nose, and nasal congestion.

**Why the Correct Answer is Right**
The correct answer is Type-1 hypersensitivity because allergic rhinitis involves IgE-mediated activation of mast cells. When an allergen enters the nasal mucosa, it binds to IgE antibodies on the surface of mast cells, leading to cross-linking of these antibodies and the subsequent release of histamine and other chemical mediators. These mediators cause the symptoms associated with allergic rhinitis by increasing vascular permeability, smooth muscle contraction, and mucus secretion.

**Why Each Wrong Option is Incorrect**
**Option B:** Type-2 hypersensitivity is characterized by IgG or IgM antibody-mediated cytotoxicity, typically seen in conditions like autoimmune hemolytic anemia or Goodpasture's syndrome. Allergic rhinitis does not involve cytotoxic mechanisms.
**Option C:** Type-3 hypersensitivity is a complex reaction involving the formation of antigen-antibody complexes that deposit in tissues, leading to inflammation. This is not relevant to allergic rhinitis.
**Option D:** Type-4 hypersensitivity is a cell-mediated reaction, typically seen in conditions like contact dermatitis or tuberculin skin test reactions. Allergic rhinitis is an immediate hypersensitivity reaction, not a cell-mediated one.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the symptoms of allergic rhinitis can be triggered by various allergens, and a thorough medical history, including questions about environmental exposures and family history, is crucial for making an accurate diagnosis.

**✓ Correct Answer: A. Type -1**