**Core Concept**
Langerhans cells are a type of dendritic cell found in the skin, playing a crucial role in the initiation of immune responses. They are antigen-presenting cells (APCs) that capture and process antigens, then present them to T-cells, thereby activating an adaptive immune response.

**Why the Correct Answer is Right**
Langerhans cells are characterized by their distinctive morphology, with long, branching extensions that facilitate antigen uptake and presentation. They express major histocompatibility complex (MHC) class II molecules, which are essential for the presentation of antigens to T-cells. Upon encountering pathogens, Langerhans cells undergo maturation, migrating from the epidermis to the regional lymph nodes, where they activate T-cells and initiate an immune response.

**Why Each Wrong Option is Incorrect**
* **Option A:** Langerhans cells are not a type of T-cell or B-cell, but rather a distinct subset of dendritic cells.
* **Option B:** While Langerhans cells do express MHC class II molecules, they are not the primary source of these molecules in the skin.
* **Option C:** Langerhans cells are not involved in the production of antibodies, which is a function of B-cells.

**Clinical Pearl / High-Yield Fact**
Langerhans cells play a critical role in the pathogenesis of skin diseases, such as psoriasis and contact dermatitis. Activation of Langerhans cells can lead to the production of pro-inflammatory cytokines, contributing to the development of these conditions.

**Correct Answer: C. Langerhans cells are a type of dendritic cell found in the skin, playing a crucial role in the initiation of immune responses.**