**Core Concept**
Juvenile angiofibroma is a benign vascular tumor that predominantly affects adolescent males, presenting with nasal obstruction, epistaxis, and sometimes, proptosis or cranial nerve palsies due to its aggressive local invasion. It arises from the sphenopalatine foramen and grows rapidly, causing nasal congestion, discharge, and facial deformity.

**Why the Correct Answer is Right**
The correct diagnosis of juvenile angiofibroma is supported by the patient's symptoms, particularly the presence of bilateral nasal obstruction and epiphora (excessive tear production) without fever. This tumor's characteristic growth pattern involves the sphenopalatine foramen, leading to nasal obstruction and epistaxis. The patient's young age and male sex also increase the likelihood of this diagnosis. Furthermore, the absence of fever makes an infectious cause like rhinoscleroma less likely.

**Why Each Wrong Option is Incorrect**
**Option A:** Nasal polyp is a common cause of nasal obstruction but typically presents with chronic nasal discharge and a mass effect rather than the aggressive growth pattern seen in juvenile angiofibroma.

**Option C:** Nasal carcinoma is a malignant tumor that may present with nasal obstruction but is less common in young patients and typically associated with a history of smoking or other risk factors.

**Option D:** Rhinoscleroma is a chronic granulomatous infection caused by Klebsiella rhinoscleromatis, characterized by nasal discharge, crusting, and atrophy of the nasal mucosa, which does not match the patient's symptom profile.

**Clinical Pearl / High-Yield Fact**
Remember that juvenile angiofibroma typically presents in adolescent males with nasal obstruction, epistaxis, and epiphora, and its growth pattern involves the sphenopalatine foramen, making it a key differential diagnosis in this patient population.

**Correct Answer:**
✓ Correct Answer: B. Juvenile angiofibroma