**Core Concept**
Tinea capitis, also known as ringworm of the scalp, is a fungal infection that affects the hair follicles of the scalp. It is a common dermatophyte infection, particularly among children.

**Why the Correct Answer is Right**
The most common cause of Tinea capitis is Trichophyton tonsurans, a type of dermatophyte fungus. This fungus infects the hair follicles, leading to inflammation, hair loss, and scaly lesions on the scalp. T. tonsurans is typically spread through direct contact with an infected person or contaminated objects, such as combs or brushes.

**Why Each Wrong Option is Incorrect**
**Option A:** **Microsporum canis** is a common cause of Tinea capitis in animals, but it is less common in humans.
**Option B:** **Epidermophyton floccosum** is a type of dermatophyte that typically causes Tinea pedis (athlete's foot) and Tinea cruris (jock itch), but it is not a common cause of Tinea capitis.
**Option C:** **Candida albicans** is a yeast that can cause various types of infections, including diaper rash and vaginal yeast infections, but it is not typically associated with Tinea capitis.

**Clinical Pearl / High-Yield Fact**
Tinea capitis is often spread through contaminated objects, such as combs or brushes, so it's essential to practice good hygiene and disinfect personal items regularly, especially in households with multiple children.

**Correct Answer:**. **Trichophyton tonsurans**