A 58-year-old man with a history of alcohol misuse presents with large volume haematemesis and melaena. He is pale and clammy, blood pressure 85/50 mmHg, pulse 120 bpm, respiratory rate 24. What is the single most appropriate immediate management?AArrange urgent upper gastrointestinal endoscopy within 24 hoursBGive an intravenous proton pump inhibitor bolus and infusionCStart high-flow oxygen and give rapid intravenous fluid resuscitationDInsert a nasogastric tube to lavage the stomachEPrescribe oral Omeprazole and dischargeCheck my answer