This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
One unit of fresh blood arises the Hb% concentration by - 
Select and explain. 
A. 0.1 gm%, B. 1 gm%, C. 2 gm%, D. 2.2 gm%
B: 1 gm%
Answer: B: 1 gm% 
Explanation: Whole blood of one unit will raise the Hemoglobin by 1 gm % in an average size adult.