This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
A 32-year-old man involved in a high-speed Road traffic accident is found unconscious at the scene. He is breathing spontaneously. In Accident and emergency, the ECG monitor now shows an irregular rhythm and no P, QRS, ST, or T waves. The rate is rapid. Which is the best management of this patient? 
Select and explain. 
A. CPR until a defibrillator is present, B. IV adrenaline, C. Urgent Echo guided pericardiocentesis, D. IV amiodarone
A: CPR until a defibrillator is present
Answer: A: CPR until a defibrillator is present 
Explanation: Ans. A CPR until a defibrillator is presentRef: CMDT 2019 pg. 411The patient is in ventricular fibrillation and needs an urgent CPR to maintain blood flow to the brain in ratio of 30:2.