<prompt> Essential fructosuria is due to deficiency ofb-galactosidaseAldolase-BFructokinaseAldose reductase  <response>: Fructosuria is a benign metabolic defect due to deficiency of fructokinase. There is no abnormality in other than excretion of fructose in urine.Ref: DM Vasudevan, 7th edition, page no: 138 