<prompt> Grattage test is used for -Tinea capitisLichen planusPemphigus vulgarisPsoriasis  <response>: Ans. is d i.e., Psoriasis Bedside tests for psoriasiso Two bedside tests can be done to confirm the clinical diagnosis of psoriasis : -Grattage testScraping the lesion with a glass slide causes accentuation of the silvery scales.Auspitzs SignScraping the lesion with glass slide causes accentuation os slivery scales as in Grattage test. If scraping is continued further, a glistening white adherent membrane Burkleys membrane appears. On removing Burkleys membrane punctate fine pinpoint bleeding becomes visible, which is referred to as Auspitzs sign. 