This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fungal infections, Scabies, Pediculosis, Subject name: Dental
[{'content': 'Drug of choice for Norwegian scabies \nSelect and explain. \nA. permethrin 5%, B. Lindane1%, C. Oral ivermectin, D. Sulphur6%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Drug of choice for Norwegian scabies - Oral ivermectin 200ug/kg/dose, two doses 10 days apa. topicals are not effective in the treatment as the crusted plaques will hinder the absorption of topical drugs. iadvl textbook of dermatology page 459', 'role': 'assistant'}]