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: Radiology
[{'content': "Which of the following is not a radiological feature of rickets: March 2010 \nSelect and explain. \nA. Metaphyseal cupping, B. Physeal widening, C. Frenkel's line, D. Triradiate pelvis", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. C: Frenkel's Line", 'role': 'assistant'}]