This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Skin
An 8-month old child presented with itchy, exudative lesions on the face, palms and soles. The siblings also have similar complaints. The treatment of choice is such a patient is: 
Select and explain. 
A. Systemic ampicillin, B. Topical betamethasone, C. Systemic prednisolone, D. Topical permethrin
D: Topical permethrin
Answer: D: Topical permethrin 
Explanation: D i.e. Topical permethrin