This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Papulosquamous Disorders, Subject name: Skin
[{'content': 'Sawtooth rete ridges are seen in: \nSelect and explain. \nA. Erythroderma, B. Psoriasis, C. Dariers disease, D. Lichen planus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. d. Lichen planusHPE of Lichen PlanusHyperkeratosisHypergranulosisAcanthosisBasal cell degeneration producing Civatte bodiesMax-Joseph SpaceBand like infiltration of Lymphocytes at dermo- epidermal junction.Saw toothing of Rete - Ridges', 'role': 'assistant'}]