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
NOT a component of Virchow triad: March 2013 
Select and explain. 
A. Endothelial injury, B. Stasis, C. Hypercoagulable states, D. Immunodeficiency
D: Immunodeficiency
Answer: D: Immunodeficiency 
Explanation: Ans. D i.e. ImmunodeficiencyThree primary abnormalities that lead to thrombus formation (called Virchow's triad) include 1) endothelial injury, 2) stasis or turbulent blood flow, and 3) hypercoagulability of the blood