This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lichen planus and Other papulosquamous disorders, Subject name: Dental
[{'content': 'Drugs causing Pityriasis rosea-like drug eruptions : \nSelect and explain. \nA. Cyclosporine, B. Steroids, C. Gold, D. Methotrexate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The best-known drug cause of a pityriasiform rash is gold therapy. Drugs causing pityriasis rosea-like reactions. Acetylsalicylic acid Griseofulvin Allopurinol Hydrochlorothiazide Isotretinoin Bismuth Methoxypromazine Barbiturates Metronidazole b-Blockers Nimesulide', 'role': 'assistant'}]