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': 'A 10-year-old boy has a fracture of the femur. The biochemical evaluation revealed Hb 11.5 gm/dl and ESR 18 mm 1 hour, serum calcium 12.8 mg/dl, serum phosphorus 2.3 mg/dl, alkaline phosphatase 28 KA units and blood urea 32 mg/dl. Which of the following is the most probable diagnosis in his case? \nSelect and explain. \nA. Nutritional rickets, B. Renal rickets, C. Hyperparathyroidism, D. Skeletal dysplasia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]