## **Core Concept**
The question tests knowledge of dermatological conditions characterized by itchy vesicles, specifically focusing on the distribution of lesions on the face, palm, and sole. This pattern suggests an infectious or allergic etiology.

## **Why the Correct Answer is Right**
The correct answer, **D. Scabies**, is right because scabies is a skin infestation caused by the mite *Sarcoptes scabiei*. It presents with intensely itchy vesicles or papules, often found in webbed areas of fingers, wrists, elbows, genitalia, and characteristically on palms and soles in infants and young children. The face can also be involved in infants. The distribution and symptoms match the description provided.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because, without a specific diagnosis provided, it's impossible to assess its accuracy directly. However, common conditions like eczema or dermatitis could present with itchy vesicles but typically don't have such a specific distribution.
- **Option B:** This option is incorrect as it's not specified, but conditions like dyshidrotic eczema present with vesicles on palms and soles but usually lack the facial involvement and intense itch seen in scabies.
- **Option C:** This option is incorrect because, similar to Option A, without specifics, it's hard to evaluate. However, conditions like herpes simplex can cause vesicles but are less likely to cause itchy vesicles on palms, soles, and faces simultaneously.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that scabies infestation often involves the hands (especially web spaces), feet (especially soles), and genital areas. In infants and young children, the palms, soles, and face can be involved. The intense itch, particularly at night, is a hallmark symptom.

## **Correct Answer: D. Scabies**