This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
[{'content': 'A patient Vipin has been taking digoxin for several years and is about to receive atropine for some other indication. A common side effect of digoxin that can be blocked by atropine is: \nSelect and explain. \nA. Decreased appetite, B. Increased cardiac contractility, C. Increased PR interval on the ECG, D. tachycardia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref-KDT 6/e p494 Digtalis possesses vagomimetic action and can cuse bradycardia and decreased av conduction. This latter effect is mannitested in the ECG as increased PR interval. Atropine can block this adverse effet.', 'role': 'assistant'}]