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': 'Drugs implicated in development of heart block include which of the following? \nSelect and explain. \nA. Beta blockers, B. Lithium, C. Adenosine, D. All the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., All the above * From the following table it is clear that all the given drugs are implicated in the development of Atrioventricular heart block.Drugs causing AV blockBeta blockers AdnosineClacium channel blockers Antiarrhythmics (class I and III)Digitalis Lithium", 'role': 'assistant'}]