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': 'Exfoliative dermatitis is seen in all the following except \nSelect and explain. \nA. Drug reaction, B. Psoriasis, C. Pityriasis rosea, D. Pityriasis rubra pilaris', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]