**Core Concept**
Dohlman's procedure is a medical intervention used to treat a specific condition affecting the nasal passages. It involves the use of a particular technique to address the issue. The underlying principle of Dohlman's procedure is based on the anatomy of the nasal mucosa and the nasal cycle.

**Why the Correct Answer is Right**
Dohlman's procedure is specifically used to treat nasopharyngeal stenosis, a condition characterized by the narrowing of the nasopharynx. This narrowing can lead to respiratory difficulties and other complications. The procedure involves the use of a nasal endoscope to visualize the area and a special instrument to dilate the stenotic region. The goal of Dohlman's procedure is to improve the patency of the nasopharynx and restore normal respiratory function.

**Option A:** This option is incorrect because Dohlman's procedure is not primarily used to treat epistaxis (nosebleeds).
**Option B:** This option is incorrect because Dohlman's procedure is not a treatment for nasal polyps.
**Option C:** This option is incorrect because Dohlman's procedure is not used to treat nasal septal deviation.

**Clinical Pearl / High-Yield Fact**
Dohlman's procedure is a valuable treatment option for patients with nasopharyngeal stenosis, and it can be performed endoscopically, reducing the risk of complications associated with open surgical procedures.

**Correct Answer: C. Nasopharyngeal stenosis. Dohlman's procedure is used to treat nasopharyngeal stenosis.**