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
Which among the following is an impoant step in acute inflammation? 
Select and explain. 
A. Vasoconstriction, B. Vascular stasis, C. Vasodilation and increased vascular permeability, D. Margination of leukocytes
C: Vasodilation and increased vascular permeability
Answer: C: Vasodilation and increased vascular permeability 
Explanation: Stages of acute inflammation:Vasodilation (after a transient vasoconstriction) Increased vascular permeabilityMovement of white blood cells from blood vessels into soft tissue at the site of inflammation: The steps required are rolling, pavementing, and transmigration. Chemotaxis is the process by which white blood cells are drawn to the site of acute inflammation.Ref: Wyatt C., Kemp W.L., Moos P.J., Burns D.K., Brown T.G. (2008). Chapter 2. Inflammation and Repair. In C. Wyatt, W.L. Kemp, P.J. Moos, D.K. Burns, T.G. Brown (Eds), Pathology: The Big Picture.