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: Dental
[{'content': 'Annular herald patch is seen in – \nSelect and explain. \nA. Psoriasis, B. P. alba, C. P. rosea, D. Nocardiasis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Mother patch or Herald patch is characteristic of P. rosea.', 'role': 'assistant'}]