<prompt> Which is not a test for diabetes mellitus aEURFasting blood samplingRandom blood samplingD-xyloseOral glucose tolerance test  <response>: D-xylose Diagnostic criteria for diabetes 1 Symptoms of diabeties plus random blood glucose concentration 200 nzgd1. Random is defined as without regard to time since last meal or 2 Fasting plasma glucoseQ 126 mgdi Fasting is defined as no caloric intake for at least 8 hrs or 3 Two hour plasma glucoseQ 200mgdl during an oral Gil In the absence of unequivocal hyperglycemia and acute metabolic decompensation these criteria should be confirmed by repeat testing on a different day. Diagnostic criteria for evaluation of standard Glucose Tolerance test according to Diabetes expe committee Normal Glucose tolerance Impaired Glucose tolerance Diabetes mellitus Fasting plasma glucose mgdl 100 100 -- 125 126 Two hours after glucose ingestion 75g 140 140 but 200 200 