This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
[{'content': 'Low serum haptoglobin in hemolysis is masked by- \nSelect and explain. \nA. Bile duct obstruction, B. Liver disease, C. Malnutrition, D. Pregnacy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Robbins basic pathology 8th edition, page no 424, Answer is option 1, bile duct obstruction Actually in hemolysis haptoglobin level decreases because some hemoglobin invariably escapes into the plasma. It is problably absent also. Haptoglobin is a circulating protein that binds and clears free hemoglobin. But the decreased level of haptoglobin is masked by the bile suct obstruction.', 'role': 'assistant'}]