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: Pediatrics
[{'content': 'A 10 year old boy has a fracture of femur. Biochemical evaluation revealed Hb 11.5 gm/dL and ESR 18 mm 1st hr. Serum calcium 12.8 mg/dL, serum phosphorus 2.3 mg/dL, alkaline phosphate 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: The patient in question has an increased serum Ca++, decreased serum phosphorus and increased values of alkaline phosphatase, suggests hyperparathyroidism. Ref: Clinical Proceedings - Children's Hospital of The District of Columbia, Volume 14 ; Nutrition and Diagnosis-Related Care By Syl Escott-Stump - 2008, Page 193 ; Avery's Diseases of The Newborn BY H. William Taeusch, Robea A. Ballard, Christine A. Gleason - 2005, Page 1359", 'role': 'assistant'}]