**Core Concept**
The clinical presentation and biopsy findings suggest a diagnosis of **Dermatitis Herpetiformis (DH)**, a chronic blistering skin condition characterized by **autoimmune** deposits of **IgA** in the skin. This condition is closely associated with **Celiac Disease**.

**Why the Correct Answer is Right**
The presence of **granular deposition of IgA** in the papillary dermis and along the epidermal basement membrane zone, along with **neutrophilic dermatitis**, is diagnostic of DH. The management of DH typically involves a strict **gluten-free diet** and may include the use of **dapsone** for symptomatic relief.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specified, but typically, treatments not targeting the autoimmune or gluten aspects of DH would be incorrect.
**Option B:** Incorrect for similar reasons as Option A, lacking specificity to DH management.
**Option D:** Incorrect as it does not address the autoimmune nature or the dietary management of DH.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that DH is strongly associated with **Celiac Disease**, and management should include a **gluten-free diet** to control symptoms and prevent complications.

**Correct Answer:** D. Dapsone and gluten-free diet.