**Core Concept**
Edema in the lower extremities, particularly the calves, can result from various pathologies affecting the venous, lymphatic, or arterial systems. The clinical presentation of calf edema is often related to conditions that impair the normal functioning of these systems, leading to fluid accumulation and swelling.

**Why the Correct Answer is Right**
The given appearance of calves is seen in **Deep Vein Thrombosis (DVT)**. DVT occurs when a blood clot forms in one or more of the deep veins of the body, typically in the legs. This clot can obstruct blood flow, leading to swelling, pain, and warmth in the affected limb. The presence of a DVT can be confirmed by imaging studies such as ultrasound or venography, which demonstrate the presence of a clot within the deep veins.

**Why Each Wrong Option is Incorrect**
* **Option A:** Calf edema can also be seen in conditions like heart failure, kidney disease, or liver cirrhosis, but the specific appearance described is most characteristic of DVT.
* **Option B:** **Varicose Veins** are a cosmetic issue and not typically associated with the acute onset of calf edema.
* **Option C:** **Cellulitis** is an infection of the skin and subcutaneous tissues, which may present with redness, warmth, and swelling, but it is not typically associated with the specific appearance of calf edema seen in DVT.

**Clinical Pearl / High-Yield Fact**
When evaluating a patient with calf edema, it is essential to consider the possibility of DVT and perform a thorough clinical examination, including assessing for signs of venous obstruction such as warmth, tenderness, and swelling.

**Correct Answer:** C.