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': 'The clot formed after coagulation cascade is not stable unless extensive cross linking occurs. This is done by - \nSelect and explain. \nA. Plasmin, B. Factor XIII, C. Thrombin, D. High molecular weight kininogen', 'role': 'user'}, {'content': 'Answer: B \nExplanation: . Factor XIII', 'role': 'assistant'}]