**Core Concept**
The washerman's eczema, also known as chromoblastomycosis, is a chronic fungal infection caused by various species of fungi, typically acquired through traumatic inoculation of spores into the skin. This condition is characterized by the formation of thick-walled, pigmented fungal structures called sclerotic bodies in the dermis.

**Why the Correct Answer is Right**
The correct answer is due to the characteristic presentation of chromoblastomycosis, which includes the development of thick, verrucous lesions and pigmentation on the skin, particularly in the web spaces of toes. The condition often results from the traumatic inoculation of fungal spores into the skin, which then lead to an inflammatory response and the formation of sclerotic bodies. The infection is usually acquired through exposure to contaminated soil or organic matter.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not describe the characteristic presentation of chromoblastomycosis.
* **Option C:** This option is incorrect because it does not accurately describe the causative agent of chromoblastomycosis.

**Clinical Pearl / High-Yield Fact**
Chromoblastomycosis is a chronic fungal infection that can be distinguished from other skin conditions by the presence of sclerotic bodies in the dermis. These structures are typically pigmented and are a hallmark of the disease.

**Correct Answer: C. Chromoblastomycosis.**