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
[{'content': 'NOT a component of Virchow triad: March 2013 \nSelect and explain. \nA. Endothelial injury, B. Stasis, C. Hypercoagulable states, D. Immunodeficiency', 'role': 'user'}, {'content': "Answer: D \nExplanation: 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", 'role': 'assistant'}]