This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'Principal Actions of prostacyclin in Inflammation is \nSelect and explain. \nA. Vasodilation, B. Vasoconstriction, C. Increased vascular permeability, D. Chemotaxis, leukocyte adhesion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Principal Actions of Arachidonic Acid Metabolites in InflammationActionEicosanoidVasodilationProstaglandins PGI2 (prostacyclin), PGE1, PGE2, PGD2VasoconstrictionThromboxane A2, leukotrienes C4, D4, E4Increased vascular permeabilityLeukotrienes C4, D4, E4Chemotaxis, leukocyte adhesionLeukotrienes B4, HETERef: Robbins and Cotran Pathologic Basis of Disease; 9th edition; Chapter 3; Inflammation and Repair; Page no: 84; Table 3-5', 'role': 'assistant'}]