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
All of the following are seen in pityriasis rosea except 
Select and explain. 
A. Herald patch, B. Christmas tree appearance, C. Collarette scales, D. Cradle cap
D: Cradle cap
Answer: D: Cradle cap 
Explanation: " Cradle cap " is a feature of seborrheic dermatitis.
Pityriasis rosea is caused by HHV 7 > HHV 6 .It presents with single plaque on trunk - "Mother's or Herald patch" followed by numerous similar lesions along the line of cleavage giving " Christmas tree or fir tree " appearance.
Lesions have peripheral scale termed as "Collarette scale" which on strecthing gives " Hanging curtain " appearance.