This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculo Skeletal Disorders, Subject name: Pediatrics
[{'content': 'The following X ray is diagnostic of: \nSelect and explain. \nA. Rickets, B. Scurvy, C. Hairline fracture of radius and ulna, D. Osteopetrosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. RicketsVitamin D deficiency results in Rickets. Major sources of vitamin D is its synthesis in the skin following exposure to ultraviolet (UVB) solar irradiation. The dermal concentration of melanin regulates the amount of UV rays that reach the epidermal layers. A lack of adequate mineralization of growing bones results in rickets. Rickets is treated by administration of 60,000IU of vitamin D given on weekly basis for 6 weeks (Through oral route). Radiographic features of rickets include: Widening and cupping of the metaphyseal regions, fraying of the metaphysis, Craniotabes, Bowing of long bones', 'role': 'assistant'}]