<prompt> All of the following are seen in pityriasis rosea exceptHerald patchChristmas tree appearanceCollarette scalesCradle cap  <response>: Cradle cap is a feature of seborrheic dermatitis.Pityriasis rosea is caused by HHV 7 HHV 6 .It presents with single plaque on trunk - Mothers 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. 