Match the following and choose the correct combination from the options given.
`{:(,"Column I",,,"Column II"),(a., "Potassium",,(i),"Germination of pollen grains"),(b.,"Molybdenum",,(ii),"Involved in synthesis of auxin"), (c., "Boron",,(iii), "Involved in protein synthesis"), (d.,"Zinc",,(iv),"Constituent of ferredoxin"),(e.,"Sulphur",,(v),"Component of nitrate reductase"):}`

Options

A. a (iii), b(iv), c(ii), d(i), e(v)
B. a(iii), b(v), c(i), d(ii), e(iv)
C. a(i), b(ii), c(iii), d(iv), e (v)
D. a(ii), b(iii), c (v), d (i), e (iv)

Answer

To solve the matching question, we will analyze each nutrient in Column I and match it with its corresponding function in Column II.

### Step-by-Step Solution:

1. **Identify Potassium (K)**:
- Potassium is essential for various physiological processes in plants, including the regulation of stomatal opening and closing, and it plays a role in enzyme activation.
- **Match**: Potassium is involved in the synthesis of auxin (plant hormone).
- **Conclusion**: Potassium (a) matches with (ii).

2. **Identify Molybdenum (Mo)**:
- Molybdenum is a crucial component of certain enzymes, including nitrate reductase, which is involved in nitrogen metabolism.
- **Match**: Molybdenum is a component of nitrate reductase.
- **Conclusion**: Molybdenum (b) matches with (v).

3. **Identify Boron (B)**:
- Boron is important for the development of pollen grains and is involved in the germination of pollen.
- **Match**: Boron is involved in the germination of pollen grains.
- **Conclusion**: Boron (c) matches with (i).

4. **Identify Zinc (Zn)**:
- Zinc plays a vital role in the synthesis of auxin and is involved in various enzymatic reactions.
- **Match**: Zinc is involved in the synthesis of auxin.
- **Conclusion**: Zinc (d) matches with (ii).

5. **Identify Sulphur (S)**:
- Sulphur is a component of amino acids and proteins, including ferredoxin, which is involved in electron transport.
- **Match**: Sulphur is a constituent of ferredoxin.
- **Conclusion**: Sulphur (e) matches with (iv).

### Final Matching:
- a - (ii) Potassium → Involved in synthesis of auxin
- b - (v) Molybdenum → Component of nitrate reductase
- c - (i) Boron → Germination of pollen grains
- d - (ii) Zinc → Involved in synthesis of auxin
- e - (iv) Sulphur → Constituent of ferredoxin

### Correct Combination:
The correct combination based on the matches is:
- a → (ii)
- b → (v)
- c → (i)
- d → (ii)
- e → (iv)