Which method is the most precise to establish the cause of bleeding from upper gastrointestinal tract:

Which method is the most precise to establish the cause of bleeding from upper gastrointestinal tract:

Which method is the most precise to establish the cause of bleeding from upper gastrointestinal tract: 


A. Stomach, duodenum x-ray
B. Diagnostic laparotomy
C. Gastroscopy
D. Arteriography
E. Radioisotope scanning


Answer: C. Gastroscopy


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