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 first effect of endotoxin is - \nSelect and explain. \nA. The first effect of endotoxin is -, B. Perivascular necrosis, C. DIC, D. All the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Endothelial damage", 'role': 'assistant'}]