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’s patch is seen in \nSelect and explain. \nA. Psoriasis, B. Pityriasis alba, C. Pityriasis rosea, D. Nocardiasis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Herald’s patches are seen in Pityriasis rosea Some patients develop single patch 2 or 3 days earlier than the main eruption this is called Herald’s patch.\nAbout Pityriasis Rosea Commonly seen in young adults\n* Commonly found on upper trunks along cleavage lines\n* The lesions are Scaly and erythematous* (cigarette paper scales are found)', 'role': 'assistant'}]