## **Core Concept**
Scabies is a skin infestation caused by the mite *Sarcoptes scabiei*. It is characterized by intense itching and a pimple-like skin rash. The condition can affect individuals of all ages, but its presentation may vary depending on the age of the patient and their immune status.

## **Why the Correct Answer is Right**
In adult scabies, the typical areas of involvement include the web spaces of fingers, wrists, elbows, genitalia, and lower buttocks. The involvement of the web spaces (option d) and genitalia (option e) are particularly characteristic. The palms and soles (option a) can be involved but are less common sites. The face (option b) and anterior abdomen (option c) are typically spared in adults.

## **Why Each Wrong Option is Incorrect**
- **Option B:** The face is typically spared in adult scabies, making this option incorrect.
- **Option C:** While the abdomen can be involved, the anterior abdomen is not a characteristic site for scabies infestation in adults, and the involvement pattern does not specifically highlight this area as a hallmark.
- **Option A:** Although palms and soles can be involved, especially in infants and young children, they are not the most characteristic sites for adult scabies.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that in adults, scabies typically spares the face, making option b a strong distractor. Remember, the web spaces of the fingers and the genital area are classic sites for scabies infestation in adults.

## **Correct Answer:** D.