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
Exudation of plasma and Leucocytes in acute inflamation is from the - 
Select and explain. 
A. Venules, B. Capillaries, C. Aerioles, D. Aerioles and capillaries
A: Venules
Answer: A: Venules 
Explanation: Ans. is 'a' i.e., Venules Post capillary venules are an impoant point of interchange between the Lumen of the vessels and the surrounding tissue. Moreover both vascular leakage and Leucocyte exudation occur preferrentially in venules in many types of inflammation. Note - In lung the Leucocyte diapedesis also occur in Capillaries.