What is the role of heparin cofactor II in the coagulation cascade?

A It inhibits thrombin and chymotrypsin ✓
B It activates protein C
C It inhibits factor Xa
D It activates plasminogen

Explanation

Heparin cofactor II is a serine proteinase inhibitor that inactivates thrombin and chymotrypsin in the presence of heparin or dermatan sulfate.

Source

Biochemistry textbooks
Hematology Hematology: Coagulation Disorders Hematology: Coagulation Disorders Hard MEDICAL Confidence: high