This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
One unit of fresh blood raises Hb% ( Hemoglobin concentration ) by 
Select and explain. 
A. 0.1gm%, B. 0.5 gm %, C. 1gm%, D. 2 gm%
C: 1gm%
Answer: C: 1gm% 
Explanation: Single unit of whole blood raises Hb by 1 gm% and Hematocrit by 3% More than 70% of transfused cells will be ble after 24 hours Ref: Harrison's 19th edition Pgno :138