Match the following and choose the correct combination from the option given
`{:("Column I", "Column II"),(A."Sulphur",i."Chlorophyll"),(2."zinc",ii."Nitrogenase"),(3."Magnesium",iii."Methionine"),(4."Molybdenum",iv. "Auxin"):}`

Options

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

Answer

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

### Step-by-Step Solution:

1. **Identify the first element: Sulphur (A)**
- Sulphur is essential for the formation of **Methionine**, which is an amino acid.
- Therefore, the match is: **A - iii (Methionine)**.

2. **Identify the second element: Zinc (2)**
- Zinc is crucial for the activity of the enzyme **Nitrogenase**, which is involved in nitrogen fixation.
- Therefore, the match is: **2 - ii (Nitrogenase)**.

3. **Identify the third element: Magnesium (3)**
- Magnesium is a key component of **Chlorophyll**, which is vital for photosynthesis.
- Therefore, the match is: **3 - i (Chlorophyll)**.

4. **Identify the fourth element: Molybdenum (4)**
- Molybdenum acts as a co-factor for the synthesis of **Auxin**, a plant hormone that regulates growth.
- Therefore, the match is: **4 - iv (Auxin)**.

### Summary of Matches:
- A - iii (Sulphur - Methionine)
- 2 - ii (Zinc - Nitrogenase)
- 3 - i (Magnesium - Chlorophyll)
- 4 - iv (Molybdenum - Auxin)

### Final Answer:
The correct combination is: **A - iii, 2 - ii, 3 - i, 4 - iv**.