**Core Concept**
Rhinoscleroma is a chronic granulomatous infection of the nasal passages and sinuses caused by a specific bacterium that affects the mucous membranes, leading to scarring and tissue destruction.

**Why the Correct Answer is Right**
The correct answer is due to the bacterium *Klebsiella rhinoscleromatis*, which is an aerobic, gram-negative rod that primarily infects the nasal mucosa, causing inflammation, scarring, and eventual destruction of the affected tissues. This bacterium is highly resistant to antibiotics and requires prolonged treatment. The infection progresses through three stages: catarrhal, granulomatous, and atrophic, with the latter stage characterized by extensive scarring and tissue destruction.

**Why Each Wrong Option is Incorrect**
* **Option A:** This is incorrect as Rhinoscleroma is not caused by *Mycobacterium tuberculosis*, which causes tuberculosis. While both conditions can affect the respiratory system, they have distinct causes and presentations.
* **Option B:** This is incorrect as *Bordetella pertussis* causes pertussis or whooping cough, a highly contagious respiratory tract infection that primarily affects children. The two conditions have different pathogens and clinical manifestations.
* **Option C:** This is incorrect as *Streptococcus pneumoniae* is a common cause of pneumonia and other respiratory tract infections, but it is not associated with Rhinoscleroma.

**Clinical Pearl / High-Yield Fact**
Rhinoscleroma is a rare but serious infection that can be misdiagnosed as other conditions, such as tuberculosis or sinusitis. Prompt recognition and treatment are essential to prevent tissue destruction and complications.

**Correct Answer:** C. *Klebsiella rhinoscleromatis*.