A 14-month-old child presents with delayed walking, bowing of the legs, frontal bossing, and widening of the wrists. The child has minimal sun exposure and is exclusively breastfed without supplementation. Laboratory findings show low phosphate, elevated alkaline phosphatase, and normal calcium. What is the most likely diagnosis?
A
Osteogenesis imperfecta
B
Nutritional vitamin D deficiency rickets