Disabilities can be classified by the timing of their origin relative to birth. The established categories for disability causation are:
The term Pro-Natal is not recognized as a category for disability origins.
Consequently, the appropriate classifications for disability causes are limited to (A), (B), and (D).
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| LIST I | LIST II | ||
|---|---|---|---|
| A | Vitamin A | II | Important for vision |
| B | Calcium | IV | Bone health |
| C | Iron | III | Oxygen transport in blood |
| D | Vitamin C | I | Absorption of iron |