Which blood component plays a crucial role in preventing excessive blood clotting by inactivating clotting factors?

A Fibrinogen
B Prothrombin
C Antithrombin III ✓
D Von Willebrand factor

Explanation

Antithrombin III is a plasma protein that inactivates several enzymes of the coagulation system, thereby preventing excessive blood clotting.

Source

Hematology: Clinical Principles and Applications
Hematology Hematology: Blood Components Hematology: Blood Components Medium MEDICAL Confidence: high