**Core Concept**
Lytic bone lesions are characterized by areas of bone destruction, often seen in various pathological conditions. The presence of beveled edges in multiple lytic lesions of the skull is a crucial radiological finding that points towards a specific diagnosis.

**Why the Correct Answer is Right**
The beveled edges seen in multiple lytic lesions of the skull are characteristic of Eosinophilic Granuloma (Langerhans Cell Histiocytosis). This condition is caused by the proliferation of Langerhans cells, which leads to the destruction of bone tissue. The beveled edges are formed due to the uneven destruction of bone, with the outer table being eroded more than the inner table. This results in a characteristic "beveled edge" appearance on radiographs.

**Why Each Wrong Option is Incorrect**
* **Option A:** Osteosarcoma typically presents with lytic lesions, but they are usually permeative and destructive, with ill-defined margins, not beveled edges.
* **Option B:** Metastatic lesions can have a lytic appearance, but they are usually multiple and well-defined, without the characteristic beveled edges.
* **Option C:** Multiple Myeloma presents with punched-out lytic lesions, which are typically well-defined and rounded, not beveled.

**Clinical Pearl / High-Yield Fact**
Eosinophilic Granuloma (Langerhans Cell Histiocytosis) can present with a wide range of symptoms, including bone pain, neurological deficits, and diabetes insipidus. It is essential to consider this diagnosis in patients with multiple lytic lesions of the skull, especially with beveled edges.

**Correct Answer:** C. Eosinophilic Granuloma (Langerhans Cell Histiocytosis).