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: Physiology
[{'content': 'Which of the following statement about Bradykinin is true: \nSelect and explain. \nA. Causes pain, B. Causes bronchodilation, C. Causes vasoconstriction, D. Decreases vascular permeability', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Causes PainBradykinin increases vascular permeability, and causes contraction of smooth muscle (utrine, intestine, bronchoconstriction), dilation of blood vessels and painQ when injected into the skin. These effects are similar to those of histamine.', 'role': 'assistant'}]