**Core Concept**
Peritonsillar abscess is a collection of pus behind the tonsils, often requiring prompt medical intervention to alleviate symptoms and prevent complications. The most effective treatment involves a combination of antibiotics and drainage of the abscess.

**Why the Correct Answer is Right**
The correct treatment for peritonsillar abscess involves incision and drainage of the abscess, often performed under general anesthesia. This procedure allows for direct access to the abscess, facilitating the removal of pus and reducing the risk of complications. The goal is to alleviate symptoms, prevent further infection, and promote healing.

**Why Each Wrong Option is Incorrect**
**Option A:** Antibiotics alone are not sufficient to treat peritonsillar abscess, as the abscess requires direct drainage for effective resolution.
**Option B:** Tonsillectomy is a surgical procedure that removes the tonsils, but it is not the primary treatment for peritonsillar abscess.
**Option C:** Nasopharyngeal aspiration may help diagnose the condition but is not a treatment for peritonsillar abscess.

**Clinical Pearl / High-Yield Fact**
It's essential to differentiate between peritonsillar abscess and other conditions, such as tonsillitis or quinsy, as the treatment approach differs significantly. Early recognition and prompt treatment can significantly improve patient outcomes.

**Correct Answer:** C.