Which one of the following is a matching pair of a certain body feature and its value/count in a normal human adult?

Q. Which one of the following is a matching pair of a certain body feature and its value/count in a normal human adult?

A.            urea 5 to 10 mg/100 ml of blood

B.            blood sugar (fasting) 80-100 mg/100ml

C.            total blood volume-3-4 litres

D.            ESR in wintrobe method- 9-15mm in males and 20-34mm in females.

Answer: blood sugar (fasting) 80-100 mg/100ml