This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal Radiography, Subject name: Radiology
[{'content': 'The study using barium for small intestine is known 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: Ans. is \'a\' i.e., Barium meal follow through o In most cases the jejunum and Ileum are examined following the barium examination of the upper gastrointestinal tract, referred to as the "barium meal and follow through" or simply **barium follow through".', 'role': 'assistant'}]