Incorrect match among the following is :

Options

A. Vitamin `B_(12)-Cu`
B. Cis - platin - Pt
C. Wilkinson catalyst - Rh
D. Chlorophyll - Mg

Answer

To determine the incorrect match among the given options, we will analyze each pair one by one.

### Step 1: Analyze Vitamin B12
- **Given Match:** Vitamin B12 with Copper
- **Actual Composition:** Vitamin B12 contains Cobalt (Co) as its central atom, not Copper (Cu).
- **Conclusion:** This match is incorrect.

### Step 2: Analyze Cisplatin
- **Given Match:** Cisplatin with Platinum
- **Actual Composition:** Cisplatin is a chemotherapy drug that contains Platinum (Pt) as its central atom.
- **Conclusion:** This match is correct.

### Step 3: Analyze Wilkinson Catalyst
- **Given Match:** Wilkinson Catalyst with Rhodium
- **Actual Composition:** The Wilkinson catalyst is a well-known catalyst in organic chemistry that contains Rhodium (Rh).
- **Conclusion:** This match is correct.

### Step 4: Analyze Chlorophyll
- **Given Match:** Chlorophyll with Magnesium
- **Actual Composition:** Chlorophyll, the green pigment in plants, contains Magnesium (Mg) at its center.
- **Conclusion:** This match is correct.

### Final Conclusion
After analyzing all the options, the incorrect match is:
- **Vitamin B12 with Copper** (it should be Vitamin B12 with Cobalt).

### Answer
The incorrect match among the following is: **Vitamin B12 with Copper.**

---