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
Hypersensitivity vasculitis is most commonly seen in: 
Select and explain. 
A. Post capillary venules, B. Aerioles, C. Veins, D. Capillaries
A: Post capillary venules
Answer: A: Post capillary venules 
Explanation: . Post capillary venules