A 70 year old man presents with haematemesis and melaena. He is tachycardic at 120 beats per minute, blood pressure 92 over 60 mmHg and capillary refill is delayed. What is the most appropriate immediate management step?AArrange urgent upper gastrointestinal endoscopy within 24 hours without resuscitationBInsert a nasogastric tube and lavage the stomachCCommence a high dose proton pump inhibitor infusion before assessmentDResuscitate with intravenous crystalloid and blood products while arranging urgent endoscopyEGive oral iron and arrange outpatient OGDCheck my answer