Bradykinin causes:: (A) Vasoconstriction, (B) Pain at the site of inflammation, (C) Bronchodilation, (D) Decreased vascular permeability
Answer is B. Bradykinin acts in the early stage of inflammation and its effects include:

Smooth muscle contraction
Vasodilatation
Increased vascular permeability
Pain.

Mohan H. Textbook of pathology. Jaypee Brothers Medical Publishers; 2015. Page: 126