You are the first doctor to arrive when a 58-year-old man collapses in the hospital corridor. He is unresponsive and not breathing normally. What is the most appropriate immediate action after calling for help?ACheck a carotid pulse for 30 secondsBDeliver two rescue breaths before chest compressionsCStart chest compressions at a ratio of 30 compressions to 2 breathsDAttach the defibrillator and analyse rhythm before starting compressionsEPlace the patient in the recovery position and reassess in 2 minutesCheck my answer