A 56-year-old man presents with haematemesis and melaena. He is pale and clammy. Observations: BP 86/54 mmHg, pulse 120 bpm, respiratory rate 24/min, oxygen saturation 95% on air. What is the most important immediate management step?AArrange urgent upper GI endoscopy within 24 hours.BGive intravenous Omeprazole bolus followed by infusion.CInsert two large-bore intravenous cannulae and start fluid resuscitation with 0.9% sodium chloride.DStart an infusion of intravenous Metoclopramide.EInsert a nasogastric tube to assess ongoing bleeding before further interventions.Check my answer