Concept:Bone strength and shape depend on calcium and phosphorus, which mineralise the bone matrix during pregnancy and childhood.
Explanation:The boy’s bones are weak and crooked, which suggests improper bone mineralisation.
This condition is usually linked to a shortage of calcium and phosphorus.
During pregnancy, the mother supplies these minerals to the developing baby for healthy skeletal growth.
A deficiency in her diet can lead to poor bone development, causing weak and deformed bones in the child.
Sodium, iron, manganese, magnesium, and sulphur are not the main minerals responsible for bone hardness.
Therefore, the most likely deficiency involves calcium and phosphorus.
Answer:C. Calcium and phosphorus