**Core Concept**
Infantile scabies is a distinct form of scabies infection that predominantly affects infants and young children, often involving the scalp and face, unlike the more common forms of scabies that typically target the hands, wrists, and genital areas.

**Why the Correct Answer is Right**
Infantile scabies is characterized by its propensity to involve the scalp, face, and neck, often sparing the hands and feet. This is due to the presence of a higher concentration of scabies mites in the scalp and facial hair of infants, making them more susceptible to infection. The mites are also more likely to penetrate the skin of infants, leading to a more widespread and severe infestation.

**Why Each Wrong Option is Incorrect**
**Option A:** Adult scabies typically involves the hands, wrists, and genital areas, rather than the scalp and face.
**Option B:** Nodular scabies is a variant of scabies characterized by the presence of nodules, but it does not specifically target the scalp and face.
**Option D:** None is incorrect because infantile scabies is a distinct form of scabies that does involve the scalp and face.

**Clinical Pearl / High-Yield Fact**
Infantile scabies often requires a more aggressive treatment approach, including the use of topical and oral medications, as well as thorough cleaning and disinfection of the infant's environment to prevent re-infestation.

**✓ Correct Answer: C. Infantile scabies**