This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid and electrolytes, Subject name: Pediatrics
Boold volume in preterm neonate is 
Select and explain. 
A. 90 ml/kg, B. 80 ml/kg, C. 70 ml/kg, D. 60 ml/kg
A: 90 ml/kg
Answer: A: 90 ml/kg 
Explanation: At the moment of bih the newborn infant was estimated to have a blood volume of 78 ml/kg with a venous hematocrit of 48 %. The average blood volume at bih was found to be 109 ml. per kilogram, a value slightly higher than in fullterm infants. In the first 2 1/2 months of life there was a tendency for the plasma volume to increase as the erythrocyte volume decreased. This had the effect of maintaining the total blood volume at a relatively high level. Reference: GHAI Essential pediatrics, 8th edition