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
[{'content': 'In Lichen planus TOC is: \nSelect and explain. \nA. Topical Salicylic acid, B. UV ray, C. Systemic steroids, D. Erythromycin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Systemic Steroids', 'role': 'assistant'}]