This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Radiology
[{'content': 'Study of small intestine using barium is called as \nSelect and explain. \nA. Barium meal follow through, B. Barium swallow, C. Barium enema, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Barium investigations:Barium swallow: the study of the pharynx and esophagus up to GE junction Barium meal: the study of stomach and duodenum up to DJ flexureBarium meal follow through the study of small intestine following barium meal up to ileocaecal junction Enteroclysis: the study of small intestine by directly instilling barium and methylcellulose into the small intestine through enteroclysis tube (Bilbo-botter tube)kept beyond DJ flexureBarium enema: the study of colon by infusing barium through the rectum (Ref: Grainger and Allison&;s diagnostic radiology 6th edition, chapter 26)', 'role': 'assistant'}]