**Core Concept**
Rickets is a pediatric bone disorder caused by a deficiency in vitamin D, calcium, or phosphate, leading to softening of bones and skeletal deformities. The diagnosis can be confirmed through radiographic examination, which reveals characteristic changes in bone density, shape, and mineralization.

**Why the Correct Answer is Right**
Rickets is characterized by radiographic features such as widened epiphyseal plates, frayed metaphyses, and a "cupping" or "trumpeting" appearance of the metaphyses due to the abnormal growth of bone tissue. The affected child's hand radiograph likely shows these distinctive changes, making Rickets the most likely diagnosis. The widened epiphyseal plates and frayed metaphyses are caused by the abnormal mineralization of osteoid tissue, which is a result of the deficiency in vitamin D and calcium.

**Why Each Wrong Option is Incorrect**
**Option A:** Scurvy is caused by a deficiency in vitamin C, which affects collagen synthesis, leading to poor wound healing and connective tissue fragility. While scurvy can cause radiographic changes, they are different from those seen in Rickets, such as subperiosteal hemorrhages and a "ground-glass" appearance of bones.

**Option C:** Hyperparathyroidism in children can cause radiographic changes such as subperiosteal bone resorption, brown tumors, and "salt-and-pepper" skull appearance. However, these changes are not typically seen in Rickets.

**Option D:** Osteogenesis imperfecta is a genetic disorder that affects collagen synthesis, leading to fragile bones and characteristic radiographic features such as wormian bones, blue sclerae, and multiple fractures. While osteogenesis imperfecta can cause skeletal deformities, the radiographic changes are distinct from those seen in Rickets.

**Clinical Pearl / High-Yield Fact**
Rickets is a preventable disease through adequate nutrition, including vitamin D and calcium supplementation, especially in areas with limited sunlight exposure. It is essential for pediatricians and radiologists to be aware of the characteristic radiographic features of Rickets to make an early diagnosis and prevent long-term skeletal deformities.

**✓ Correct Answer: B. Rickets**