Adult patient with multiple scaly macules over chest and back, test which can diagnose this condition is/ are?

Ans. is 'd' i.e., All the above Information in this question Adult patient Hypopigmented macule With scales Over chest and back Most probable diagnosis is: Pityriasis versicolor Diagnosis of Pityriasis versicolor Examination of scales in 10% KOH shows sho hyphae and round spores (Sphagetti and meat ball appearance). Wood lamp shows apple green fluorescence (blue-green fluorescence). Skin surface biopsy ---> A Cyanoacrylate adhesive (Crazy glue) is used to remove the layer of stratum coreum on glass slide and then stained with PAS reagent.