6)Elderly women who have been taking indomethacin for many years suddenly vomited about 300 ml of coffee like gastric content last night with upper abdominal pain.Which of the following is the most...

6)Elderly women who have been taking indomethacin for many years suddenly vomited about 300 ml of coffee like gastric content last night with upper abdominal pain.Which of the following is the most valuable for a clear diagnosis? AEmergency endoscopy BX-ray barium penetration CH2 blocker test treatment DDrinking water ultrasound EGastric juice analysis