A 24-year-old man collapses in the street. A bystander calls an ambulance. On arrival, he is unresponsive and not breathing normally, with occasional gasps. What is the most appropriate immediate action for the attending clinician?ACheck for a carotid pulse for 30 secondsBStart chest compressions at a rate of 100–120 per minuteCGive two rescue breaths before starting compressionsDPlace him in the recovery position and recheck in 10 minutesEApply an automated external defibrillator only after 5 minutes of CPRCheck my answer