A 72-year-old man collapses in the outpatient department. He is unresponsive, not breathing normally and has no carotid pulse. What is the most appropriate immediate action?ACheck his blood glucose before starting resuscitationBBegin chest compressions at a rate of 100 to 120 per minute and call the resuscitation teamCPlace him in the recovery position and wait for spontaneous breathingDObtain written consent from a relative before starting CPREPerform abdominal thrusts to clear the airwayCheck my answer