This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
[{'content': 'All of the following are the actions of beta blockers in heart failure except: \nSelect and explain. \nA. Decrease mortality, B. Antagonism of vasoconstriction, C. Prevent pathological remodeling, D. Prevent cardiac arrhythmias', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Antagonism of vasoconstrictionBeta blockers actually cause vasoconstriction via antagonizing the vasodilation caused by beta 2 receptor. Rest all are the pharmacological actions of beta blockers.', 'role': 'assistant'}]