A patient presents to emergency ward with massive upper gastrointestinal bleed.On examination, he has mild splenomegaly.In the absence of any other information available.Which of the following is the most appropriate therapeutic modality -

• A. Intravenous propranolol
• B. Intravenous vasopressin
• C. Intravenous pantoprazole
• D. Intravenous somatostatin