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': 'A young boy presented to OPD with multiple shiny pinhead size white papules over dorsum of hand, forearm and penis. What would be the diagnosis? \nSelect and explain. \nA. Scabies, B. Lichen planus, C. Lichen nitidus, D. Molluscum contagiosum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: lichen nitidus-monomorphic eruption of asymptomatic minute skin coloured shiny papules common sites- forearm, penis,buttocks, lower abdomen and chest age- common in children and young adults histopathology- claw clutching ball appearence rx- self limitingtopical steroids,PUVA,NBUVB,Systemic steroids. scabies - erythematous papules in web spaces, axilla, groins involving circle of hebra lichen planus- violaceous flat topped papules. molluscum contagiosum- pearly papules with central umbilication. IADVL textbook of dermatology page 1082.', 'role': 'assistant'}]