**Core Concept**
Allergic rhinitis is a common chronic inflammatory condition characterized by an overreaction of the immune system to harmless environmental allergens, leading to nasal symptoms such as congestion, sneezing, and rhinorrhea. The nasal mucosa in allergic rhinitis undergoes significant changes, including edema, increased vascularity, and mucosal thickening.

**Why the Correct Answer is Right**
The nasal mucosa in allergic rhinitis becomes pale and swollen due to the release of histamine and other mediators from mast cells, leading to vasodilation and increased vascular permeability. This results in the accumulation of fluid and inflammatory cells in the nasal mucosa, causing it to swell and become pale. The increased mucosal thickness and edema contribute to nasal congestion and obstruction.

**Why Each Wrong Option is Incorrect**
**Option B:** "Pink and swollen" is incorrect because the nasal mucosa in allergic rhinitis is typically pale, not pink. Pink coloration is more characteristic of acute inflammation or infection.
**Option C:** "Atrophied" is incorrect because the nasal mucosa in allergic rhinitis is actually hypertrophied, or thickened, due to chronic inflammation and edema.
**Option D:** "Bluish and atrophied" is incorrect because the nasal mucosa in allergic rhinitis is typically pale, not bluish, and it is not atrophied, but rather hypertrophied.

**Clinical Pearl / High-Yield Fact**
A key clinical feature of allergic rhinitis is the presence of a "boggy" nasal turbinates, which are swollen and edematous due to chronic inflammation.

**Correct Answer:**
✓ Correct Answer: A. Pale and swollen