A 63-year-old man collapses in a shopping centre. He is unresponsive and not breathing normally. You are the first doctor on the scene. According to current UK basic life support guidelines, what is the most appropriate first action?AStart chest compressions at a rate of 100–120/min after calling for helpBCheck carotid pulse for at least 30 secondsCGive two rescue breaths before calling for helpDPlace in the recovery position and observeEAdminister 1 mg intravenous Adrenaline immediatelyCheck my answer