This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cellular Pathology, Subject name: Pathology
Which among the following is the hallmark of acute inflammation? 
Select and explain. 
A. Vasoconstriction, B. Stasis, C. Vasodilation and increase in permeability, D. Leukocyte margination
C: Vasodilation and increase in permeability
Answer: C: Vasodilation and increase in permeability 
Explanation: Ans, (c) Vasodilation and increase in permeabilityRef: Robbins pathology 9th ed. 173* Hallmark of acute inflammation is increased vascular permeability leading to the escape of protein-rich exudate into the extravascular tissue, causing edema.