This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hemodynamics, Subject name: Pathology
[{'content': 'The most common source of embolism: \nSelect and explain. \nA. DVT, B. Trauma, C. Infection, D. Surgery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) DVT(Ref: Robbins 9th/pg 127; 8th/pg 126)MC cause of venous embolism is DVTMost arise in the deep leg veins above the level of the knee. Q', 'role': 'assistant'}]