Discussion
Identify the correct match between the vitamins and their deficiency symptoms
| Vitamins | Symptoms |
|---|---|
| (i) Vitamin A | (p) Night blindness |
| (ii) Vitamin D | (q) Anemia |
| (iii) Vitamin B6 | (r) Bone softening |
| (iv) Vitamin C | (s) Delayed wound healing |
| (v) Vitamin K | (t) Prolonged bleeding |
Answer: B
The correct match is (i) - (p), (ii) - (r), (iii) - (q), (iv) - (s), (v) - (t).
- Vitamin A: night blindness, since it forms retinal for the rod pigment rhodopsin.
- Vitamin D: bone softening, as rickets in children and osteomalacia in adults, from poor calcium absorption.
- Vitamin B6: anaemia, because pyridoxal phosphate is needed for the first step of haem synthesis.
- Vitamin C: delayed wound healing, as in scurvy, because it is needed to make stable collagen.
- Vitamin K: prolonged bleeding, because it is needed to activate clotting factors II, VII, IX and X.
The other options pair vitamin D with anaemia, or swap the symptoms of vitamins C and K, or give vitamin A anaemia; each breaks at least one of these pairs.
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