**Core Concept**
Antrochoanal polyps are benign, growths that arise from the mucous membranes of the maxillary sinus, specifically from the medial wall. They can cause nasal obstruction, discharge, and other respiratory symptoms.

**Why the Correct Answer is Right**
The gold standard treatment for antrochoanal polyps is surgical removal via endoscopic sinus surgery (ESS). This approach allows for the precise removal of the polyp while preserving surrounding structures and minimizing tissue damage. The ESS procedure involves the use of a nasal endoscope and specialized instruments to access the maxillary sinus and remove the polyp.

**Why Each Wrong Option is Incorrect**
**Option A:** Antibiotics alone would not be sufficient for the management of antrochoanal polyps, as they are primarily a mechanical obstruction and not an infectious process.
**Option B:** Radiotherapy is not indicated for the treatment of benign lesions like antrochoanal polyps.
**Option C:** Conservative management with nasal decongestants and saline irrigation may provide temporary relief but is not a definitive treatment for antrochoanal polyps.

**Clinical Pearl / High-Yield Fact**
Antrochoanal polyps are often associated with chronic nasal obstruction, and their removal via ESS can significantly improve respiratory function and quality of life.

**Correct Answer: C. Conservative management with nasal decongestants and saline irrigation may provide temporary relief but is not a definitive treatment for antrochoanal polyps.**