Which of the following investigations are done in a case of duodenal ulcer? 1. Hypotonic duodenography 2. Barium meal 3. Barium swallow 4. Upper GI endoscopy 5. Abdominal X ray erect
1, 2 & 3 1, 2 & 4 2, 3 & 4 2, 4 & 5