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: Pathology
The best method for estimation of hemoglobin concentration in blood is 
Select and explain. 
A. Acid hematin method, B. Alikali hemantin method, C. Cyanmethemoglobine method, D. Non of the above
C: Cyanmethemoglobine method
Answer: C: Cyanmethemoglobine method 
Explanation: None