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
Low serum hepatoglobin in hemolysis is masked by 
Select and explain. 
A. Pregnancy, B. Liver Disease, C. Bile duct Obstruction, D. Malnutrition
C: Bile duct Obstruction
Answer: C: Bile duct Obstruction 
Explanation: In case of Bile duct obstruction, serum haptoglobin not excreted properly, so their levels falsely normal even in Intravascular hemolysis.