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': 'All of the following are seen in pityriasis rosea except \nSelect and explain. \nA. Herald patch, B. Christmas tree appearance, C. Collarette scales, D. Cradle cap', 'role': 'user'}, {'content': 'Answer: D \nExplanation: " Cradle cap " is a feature of seborrheic\xa0dermatitis.\nPityriasis rosea is caused by HHV 7 > HHV 6 .It presents with single plaque on trunk - "Mother\'s or Herald\xa0patch" followed by numerous similar lesions along the line of cleavage giving " Christmas tree or fir tree " appearance.\nLesions have peripheral scale termed as "Collarette\xa0scale" which on strecthing gives " Hanging curtain " appearance.', 'role': 'assistant'}]