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
Immediate transient type of increase vascular permeability in acute inflammation - 
Select and explain. 
A. Venules, B. Capillaries, C. Aerioles, D. None
A: Venules
Answer: A: Venules 
Explanation: Ans. is 'a' i.e., Venules Formation of endothelial gaps in venules is the most common mechanism of vascular lekage