**Core Concept**
The question is testing the ability to identify a dermatological condition characterized by neutrophilic infiltration in the dermis, which is a hallmark of certain types of skin lesions. This condition is often associated with an underlying infection or inflammatory process.

**Why the Correct Answer is Right**
The presence of neutrophilic infiltration in the dermis suggests a condition known as Sweet's syndrome, also known as acute febrile neutrophilic dermatosis. This condition is characterized by the sudden onset of fever, malaise, and tender erythematous skin lesions, often in association with an underlying infection, inflammatory process, or malignancy. The neutrophilic infiltration in the dermis is a key diagnostic feature, and the condition responds well to corticosteroid therapy.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option might refer to a condition such as erythema multiforme, which is characterized by targetoid lesions and often associated with a viral infection, but it does not typically present with neutrophilic infiltration in the dermis.
* **Option B:** This option might refer to a condition such as erythema nodosum, which is characterized by tender erythematous nodules on the legs, but it is not typically associated with neutrophilic infiltration in the dermis.
* **Option C:** This option might refer to a condition such as toxic epidermal necrolysis (TEN), which is a severe skin condition often associated with medication use, but it is characterized by full-thickness skin necrosis and not typically by neutrophilic infiltration in the dermis.

**Clinical Pearl / High-Yield Fact**
The presence of neutrophilic infiltration in the dermis is a key diagnostic feature of Sweet's syndrome, and this condition should be considered in any child presenting with fever and tender erythematous skin lesions.

**Correct Answer:** C.