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': 'Which of the following is not true about fibroblasts? \nSelect and explain. \nA. Secrete & Synthesize collagen, B. Derived from blood precursor cells, C. Migrate to wound along fibres used as scaffold, D. Large fibrin clot acts as barrier to fibroblast penetration', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]