A 65-year-old man presents after a syncopal episode while walking. He has a systolic murmur radiating to the carotids, exertional chest pain and dyspnoea. ECG is normal. Which feature is a red flag requiring urgent cardiology assessment?AAge over 60 yearsBMurmur radiating to the axillaCSyncope associated with exertion and aortic stenosis murmurDSyncope while sitting quietly with no cardiac findingsEA prodrome of nausea and sweatingCheck my answer