Which of the following is decreased in intravascular hemolysis?

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Haptoglobin is a protein that binds to free hemoglobin released from the breakdown of red blood cells. In cases of intravascular hemolysis, there is increased release of hemoglobin into the circulation, leading to decreased levels of haptoglobin as it becomes depleted. Urine hemoglobin and serum hemoglobin levels may increase in intravascular hemolysis, and urine urobilinogen levels may be increased or normal.

Which of the Following Is Decreased in Intravascular Hemolysis