This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmia 3, Subject name: Medicine
[{'content': 'A 70-year-old man with a past medical history of ischemic hea disease and hypeension presents to his GP with recurrent episodes of syncope over the past 2 weeks.Based upon this ECG, which of the following clinical findings is most likely to be present? \nSelect and explain. \nA. Absent JVP, B. Canon A waves, C. Absent hepato-jugular reflux, D. Giant V waves', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Complete Hea block. HR=30/minute As Bundle of his fire on rate of <40/min. P-P & R-R intervals are unequal. So atrial rate & ventricular rate are not equal. -Canon A wave in JVP seen on complete hea block', 'role': 'assistant'}]