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
Which of the following statement about bradykinin is true 
Select and explain. 
A. Causes pain, B. Causes bronchodilation, C. Causes vasoconstriction, D. Decreases vascular permeability
A: Causes pain
Answer: A: Causes pain 
Explanation: None