This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiology Q Bank, Subject name: Radiology
[{'content': 'The following Pelvic Radiograph is seen in? \nSelect and explain. \nA. Achondroplasia, B. Osteoahritis, C. Nail Patella Syndrome, D. Rheumatoid Ahritis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The Given Radiograph shows Iliac Horns which are a feature of Nail Patella Syndrome Nail-patella syndrome - is characterized classically by the tetrad of Nail hypoplasia Aplastic or hypoplastic patellae Elbow dysplasia and Presence of iliac horns Iliac horns are considered pathognomonic, and the presence of hypoplastic or aplastic patellae in conjunction with nail abnormalities is a cardinal feature of diagnosis.', 'role': 'assistant'}]