Final answer:
Erythema toxicum in newborns is characterized by a red, raised area with a white pus-filled center, typically appearing within the first week of life and resolving spontaneously.
Step-by-step explanation:
Erythema toxicum in newborns resembles B) A red, raised area with white pus-filled center. This condition typically presents with erythematous macules, papules, and pustules and is considered a common benign skin finding in newborns. Unlike impetigo, it does not form large, fluid-filled blisters and crusty sores. It is also distinct from skin conditions related to allergic reactions, such as the wheal and flare response that allergists look for during skin testing, and other skin infections like cellulitis, erysipelas, and acne. Symptoms of erythema toxicum usually appear within the first week of life and resolve spontaneously without treatment.