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: Dental
[{'content': 'Max. Joseph&;s space is a histopatho-logical feature of - \nSelect and explain. \nA. Psoriasis vulgaris, B. Lichen planus, C. Pityriasis rosea, D. Parapsoriasis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lichen planus in histopathology shows thickened granular layer , saw toothing of rete ridges , basal cell degeneration ( leading to Max Joseph s spaces and colloid/ Civatte body formation) and a band like upper dermal infiltrate of lymphocytes. IADVL TEXTBOOK OF DERMATOLOGY PAGE 1070', 'role': 'assistant'}]