This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Dental
[{'content': 'Auspitz sign is seen in \nSelect and explain. \nA. Psoriasis, B. Lichen planus, C. Alopecia aerate, D. Lichen sclerosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Auspitz sign is seen in psoriasis: Psoriasis lesions are covered with silvery-white mica-like scales. when scaling is not visible to diagnose unceain cases it is induced by light scratching. Successive removal of scales reveals underlying membrane with small bleeding spots where the thin supra-papillary epidermis has been torn off this sign of visible bleeding spots on the removal of scales is seen in psoriasis The Auspitz sign refers to the appearance of small bleeding points after successive layers of scale have been removed from the surface of psoriatic papules or plaques. Ref Harrison 20th edition pg 1211', 'role': 'assistant'}]