This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Which of the following is false with regards to ultrasonography? \nSelect and explain. \nA. Interpretation only possible during the examination, B. No radiation, C. Not good for soft tissue, D. Inexpensive', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]