<prompt> Essential pentosuria is due to deficiency of:FructokinasePhosphoglucomutaseXylulose reductaseGluonolactone oxidase  <response>: Essential Pentosuria: Occurs due to deficiency of : Xylulose reductase Xylitol dehydrogenase. L-Xylulose in urine, gives positive Benedicts test Glucose Oxidase test strip negative Garrods Tetrad Pentosuria, Albinism, Alkaptonuria, Cystinuria Due to consumption of large amount of fruits that are rich in Pentoses Fructokinase deficiency causes essential fructosuria, not essential pentosuria 