A 62-year-old man reports exertional central chest tightness relieved by rest. His resting ECG is normal. He has no red-flag features. What is the most appropriate initial management in primary care?AStart sublingual Glyceryl Trinitrate, optimise risk factors and arrange urgent but non-emergency cardiology assessmentBArrange immediate thrombolysisCPrescribe long-term oral MorphineDReassure and discharge without further assessmentEStart high-dose beta-blocker without further investigations or GTNCheck my answer