<prompt> Normal CSF protein measured at basal cistern is0-- 10 mgdL20 -- 50 mgdL10 -- 25mgdLMore than 100 mgdL  <response>: B 20-50 mgdL CEREBROSPINAL FLUIDConstituentReference RangeSI UnitsConventional UnitsOsmolarity292-297 mmolkg water292-297 mOsmLElectrolytes Sodium137-145 mmolL137-145 meqL Potassium2.7-3.9 mmolL2.7-3.9 meqL Calcium1.0-1.5 mmolL2.1-3.0 meqL Magnesium1.0-1.2 mmolL2.0-2.5 meqL Chloride116-122 mmolL116-122 meqL CO2 content20-24 mmolL20-24 meqLPCO26-7 kPa45-49 mmHgpH7.31-7.34 Glucose2.22-3.89 mmolL40-70 mgdLLactate1-2 mmolL10-20 mgdLTotal protein: Lumbar0.15-0.5 gL15-50 mgdL Cisternal0.15-0.25 gL15-25 mgdL Ventricular0.06-0.15 gL6-15 mgdL Albumin0.066-0.442 gL6.6-44.2 mgdL IgG0.009-0.057 gL0.9-5.7 mgdLCEREBROSPINAL FLUID IgG index0.29-0.59 Oligoclonal bands OGB2 bands not present in matched serum sample Ammonia15-47 mmolL25-80 ngdLCreatinine44-168 pmolL0.5-1.9 mgdLMyelin basic protein4 ngL CSF pressure 50-180 mmH2OCSF volume adult-150 mL Red blood cells00Leukocytes Total0-5 mononuclear cells per pL Differential Lymphocytes60-70 Monocytes30-50 NeutrophilsNone 