A 63-year-old man with a history of peptic ulcer disease presents with large-volume haematemesis and melaena. He is pale and clammy with blood pressure 80/50 mmHg and pulse 124 bpm. What is the single most appropriate immediate management step?AArrange urgent endoscopy within 24 hoursBGive high-dose intravenous OmeprazoleCAdminister a rapid intravenous crystalloid bolus and activate the major haemorrhage protocolDInsert a nasogastric tube for lavageEStart oral Tranexamic acidCheck my answer