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': 'A young boy presented to OPD with multiple shiny pinhead size white papules over dorsum of head, forearm and penis. What would be the diagnosis? \nSelect and explain. \nA. Lichen planus, B. Lichen nitidus, C. Scabies, D. MC', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Lichen nitidusLichen nitidus on histology shows claw clutching appearance', 'role': 'assistant'}]