Match and find the correct combination
`{:("Column I","Column II"),(A. Mg, i. "Splitting of water during photosynthesis"),(B.MO,ii."Germination of pollen grain"),(D.Mn,iii."Constituent of chlorophyll"),(D.B,iv."component of nitrate reductase"),( ,v. "synthesis of auxin"):}`

Options

A. a-ii,b-v,c-iv,d-i
B. a-iii,b-iv,c-ii,d-i
C. a-iii,b-v,c-iv,d-i
D. a-iii,b-iv,c-I,d-ii

Answer

To solve the matching question, we will analyze each element in Column I and find its corresponding function in Column II.

### Step-by-Step Solution:

1. **Identify the elements in Column I:**
- A. Mg (Magnesium)
- B. Mo (Molybdenum)
- C. Mn (Manganese)
- D. B (Boron)

2. **Identify the functions in Column II:**
- i. "Splitting of water during photosynthesis"
- ii. "Germination of pollen grain"
- iii. "Constituent of chlorophyll"
- iv. "Component of nitrate reductase"
- v. "Synthesis of auxin"

3. **Match Magnesium (Mg):**
- Magnesium is a key component of chlorophyll, which is essential for photosynthesis.
- **Match:** A (Mg) → iii ("Constituent of chlorophyll")

4. **Match Molybdenum (Mo):**
- Molybdenum is involved in the function of nitrate reductase, which is important for nitrogen metabolism.
- **Match:** B (Mo) → iv ("Component of nitrate reductase")

5. **Match Manganese (Mn):**
- Manganese plays a role in the splitting of water during photosynthesis, which is crucial for the oxygen evolution process.
- **Match:** C (Mn) → i ("Splitting of water during photosynthesis")

6. **Match Boron (B):**
- Boron is important for the germination of pollen grains and is involved in the synthesis of auxins.
- **Match:** D (B) → ii ("Germination of pollen grain")

### Final Matching:
- A (Mg) → iii ("Constituent of chlorophyll")
- B (Mo) → iv ("Component of nitrate reductase")
- C (Mn) → i ("Splitting of water during photosynthesis")
- D (B) → ii ("Germination of pollen grain")

### Summary of Correct Combinations:
- A → iii
- B → iv
- C → i
- D → ii