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': 'Bradykinin is for all ; except \nSelect and explain. \nA. Pain, B. Vasodilatation, C. Vasoconstriction, D. Increase vascular permeability', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Increases vascular permeability\nArteriolar dilation\nBronchial smooth muscle contraction\nPain at the site of injections/inflammation\n\nSince increased vascular permeability is the most characteristic feature of acute inflammation, some people were of the opinion that this could be single best option to be marked presuming the stem of question was correct.', 'role': 'assistant'}]