**Core Concept**
Microsporum is a genus of fungi that belong to the family Arthrodermataceae, commonly associated with dermatophytosis, a type of fungal infection affecting the skin. These fungi are known to cause various types of skin lesions, including ringworm, tinea corporis, and tinea capitis.

**Why the Correct Answer is Right**
Microsporum species, such as Microsporum canis and Microsporum gypsum, are keratinophilic fungi that infect the keratinized tissues of the skin, hair, and nails. They produce enzymes that break down keratin, leading to the characteristic skin lesions and hair loss seen in these infections. The spores of Microsporum fungi can be spread through direct contact with an infected individual or contaminated objects.

**Why Each Wrong Option is Incorrect**
**Option A:** Not a correct genus of fungi associated with dermatophytosis.
**Option B:** Not a correct genus of fungi associated with dermatophytosis.
**Option C:** Not a correct genus of fungi associated with dermatophytosis.

**Clinical Pearl / High-Yield Fact**
It's essential to note that Microsporum infections can be treated with topical or oral antifungal medications, and early diagnosis is crucial to prevent the spread of the infection.

**Correct Answer:** D. Microsporum.