It cannot be cured by taking vitamin D:

Explanation

The correct answer is Hypophosphatemic rickets. This condition is not resolved by vitamin D supplementation because it stems from a phosphate deficiency, not a lack of vitamin D. Vitamin D is crucial for calcium and phosphate absorption, but it does not directly increase phosphate levels. Therefore, treatment requires addressing the phosphate deficiency specifically. On the other hand, Dietary rickets and Osteomalacia are conditions that often improve with vitamin D supplementation due to their association with vitamin D deficiency. General bone weakness can also improve with vitamin D if the weakness is due to a deficiency in this vitamin.