**Core Concept**
Kerion is a type of inflammatory tinea capitis (ringworm of the scalp) characterized by severe inflammation, leading to scarring and permanent hair loss. It is caused by fungal infections, typically Trichophyton tonsurans or Trichophyton violaceum.

**Why the Correct Answer is Right**
Kerion is caused by the body's intense inflammatory response to the fungal infection, which leads to the destruction of hair follicles and surrounding tissues. The inflammatory response is mediated by various cytokines, including TNF-alpha and IL-1 beta, which recruit immune cells to the site of infection. The fungal infection triggers an autoimmune response, leading to the formation of granulomas and scarring.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because kerion is not caused by a bacterial infection. While bacterial superinfection can occur in kerion, it is not the primary cause of the condition.
**Option B:** This option is incorrect because kerion is not caused by a viral infection. Viral infections can cause other types of scalp inflammation, but not kerion specifically.
**Option C:** This option is incorrect because kerion is not caused by a parasitic infection. While parasites can cause other types of scalp conditions, kerion is a fungal infection.

**Clinical Pearl / High-Yield Fact**
Kerion can be treated with antifungal medications, such as griseofulvin or terbinafine, and corticosteroids to reduce inflammation. Early treatment is essential to prevent scarring and permanent hair loss.

**Correct Answer:** C.