**Core Concept:**
The immune complex hypersensitivity reaction is a type of immune response in which immune complexes, which are formed when antibodies bind to antigens, become deposited in tissues. This can lead to inflammation and tissue damage due to the activation of complement system and recruitment of inflammatory cells.

**Why the Correct Answer is Right:**
The correct answer, **C. Arthritis**, is related to the deposition of immune complexes in joints, causing inflammation and joint pain. This type of hypersensitivity reaction is known as immune complex-induced arthritis.

**Why Each Wrong Option is Incorrect:**
A. **Hemolysis:** This option is incorrect because immune complex-induced hemolysis occurs due to the deposition of immune complexes in the kidney, leading to damage of red blood cells. This is a different type of hypersensitivity reaction known as glomerulonephritis.

B. **Skin involvement:** While immune complex deposition can lead to skin involvement in some cases, the focus of the question is on the specific type of hypersensitivity reaction, not the location.

D. **Hemolytic uremic syndrome:** This is another type of immune complex-induced reaction, specifically associated with the deposition of immune complexes in blood vessels, leading to damage of red blood cells and thrombosis. It is distinct from the reaction described in the question, which focuses on arthritis.

**Clinical Pearl / High-Yield Fact:**
Hypersensitivity reactions can be classified into five types based on the activation of the immune system and the site of immune complex deposition:

1. Type I (immediate) hypersensitivity reactions: Direct activation of effector cells, such as mast cells and basophils, leading to histamine release and inflammation.
2. Type II (complement-dependent) hypersensitivity reactions: Direct activation of the classical complement pathway, leading to cell lysis and release of inflammatory mediators.
3. Type III (complex-dependent) hypersensitivity reactions: Formation of immune complexes, which are deposited in tissues and cause tissue damage through activation of the complement system (C3a, C5a, etc.) and recruitment of inflammatory cells.
4. Type IV (delayed) hypersensitivity reactions: Activation of T cells and macrophages, leading to the production of inflammatory cytokines and the recruitment of inflammatory cells. Type IV hypersensitivity reactions can be further classified into delayed hypersensitivity (Type IVa) and cell-mediated immunity (Type IVb).
5. Type V (antibody-dependent cellular cytotoxicity) hypersensitivity reactions: Cytotoxic T cells recognize and bind to the target cells bearing the foreign antigen, leading to the release of cytotoxic molecules and cell lysis.

**Core Concept Explanation:**
Type III hypersensitivity reactions involve the activation of the complement system (C3a, C5a, etc.) and recruitment of inflammatory cells, leading to tissue inflammation and damage. This type of reaction is characterized by immune complex deposition in tissues. In this case, the correct answer is **C. Arthritis**, as it is a clinical manifestation of immune complex deposition in joints, causing inflammation and joint pain. Type III hypersensitivity reactions are typically associated with infections