The correct option is B Glucose
When the blood glucose level exceeds about 160-180 mg/dl, the proximal tubule begins to excrete glucose in the urine and such condition is called as glycosuria. Glycosuria leads to excessive water loss into the urine with resultant dehydration, a process called osmotic diuresis. In fever, there is dehydration because of glycosuria. Thus, the correct answer is option A.