This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute coronary syndrome, Subject name: Medicine
[{'content': 'A patient becomes pulseless and his BP crashes after myocardial infarction. Diagnosis is? \nSelect and explain. \nA. Monomorphic ventricular tachycardia, B. Bidirectional tachycardia, C. Polymorphic ventricular tachycardia, D. Ventricular fibrillation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The hea rate is 250 bpm and broad complex QRS is seen in all leads. The patient has Ventricular Tachycardia Needs a DC shock of 200 J biphasic.', 'role': 'assistant'}]