This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'A child is presenting with erythematous follicular papules on the trunk. There are areas of normal skin within the lesions. There is thickening of Palms & soles. This child is suffering from - \nSelect and explain. \nA. Pityriasis rosea, B. Pityriasis rubra pilaris, C. Psoriasis, D. Seborrheic dermatitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans-B', 'role': 'assistant'}]