Write tha name of the vitamin whose deficiency causes bone deformities in children.

Explanation

**Step-by-Step Solution:**

1. **Understanding Bone Deformities in Children:**
- Bone deformities in children often manifest as soft and weak bones that can bend easily. This condition is commonly observed in growing children.

2. **Identifying the Cause:**
- The primary cause of these bone deformities is linked to nutritional deficiencies, particularly the lack of certain vitamins that are essential for bone health.

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