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': 'A patient presents with right hypochondrium pain. Which of the following investigations should be done: \nSelect and explain. \nA. CT, B. MRI, C. USG, D. Cholecystogram', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) USGRef: Bailey 26th ed. H100', 'role': 'assistant'}]