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: Pharmacology
[{'content': 'All the following statements regarding adenosine are true except: \nSelect and explain. \nA. Dipyridamole potentiates its action, B. Used to produce controlled hypotension, C. Administered by slow I.V. injection, D. Administered by rapid I.V. injection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]