This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conducting System of Hea, Subject name: Physiology
[{'content': 'Wenckebach bundle is: \nSelect and explain. \nA. Involved in the hea block, B. The fastest conducting pa in the hea, C. An abnormal connection between right atrium and ventricles, D. A bundle that relays impulse from SA node to AV node', 'role': 'user'}, {'content': "Answer: D \nExplanation: Internodal tracts conducts impulses from SA node to AV node. Anterior - Bachmann's bundle. Middle - Wenckebach's bundle. Posterior - Thorel's bundle. Bundle of Kent aberrant anomalous path connecting atria to ventricle; bypassing AV node. Characterized by delta wave on ECG. (WPW syndrome).", 'role': 'assistant'}]