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: Microbiology
[{'content': 'Bradykinin causes: \nSelect and explain. \nA. Vasoconstriction, B. Pain at the site of inflammation, C. Bronchodilation, D. Decreased vascular permeability', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bradykinin acts in the early stage of inflammation and its effects include:\n\nSmooth muscle contraction\nVasodilatation\nIncreased vascular permeability\nPain.\n\nMohan H. Textbook of pathology. Jaypee Brothers Medical Publishers; 2015. Page: 126', 'role': 'assistant'}]