This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'Combination use of Beta blockers and Calcium channel blockers can cause all but except \nSelect and explain. \nA. Hea block, B. Hypeension, C. Hypotension, D. Bradycardia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Refer kDT 6/e p533 When beta blockers are given with verapamil and diltiazem they produce: Additive sinus depression,conductive deafness, asystole resulting in marked bradycardia and AV block Cardiac arrest may happen due to this combination Both decrease in BP so result in hypotension', 'role': 'assistant'}]