This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal system, Subject name: Radiology
[{'content': 'Flaring of anterior ends of the ribs is characteristically seen in - \nSelect and explain. \nA. Neurofibromatosis, B. Gout, C. Rickets, D. Hypothyroidism', 'role': 'user'}, {'content': 'Answer: C \nExplanation: MULTIPLE SYMMETRICAL ANTERIOR RIB ENLARGEMENT, FLARING, OR CUPPING * Achondroplasia * Normal variant * Rickets * Scurvy * Thanatophoric dysplasia', 'role': 'assistant'}]