The only vitamin with metal atom in it is

Options

A. Vitamin A
B. Vitamin K
C. Vitamin `B_(12)`
D. Vitamin E.

Answer

To solve the question "The only vitamin with a metal atom in it is," we can follow these steps:

### Step 1: Identify the Vitamins
First, we need to list out some common vitamins and check if they contain any metal atoms. The vitamins we will consider include:
- Vitamin A
- Vitamin B12
- Vitamin C
- Vitamin D
- Vitamin K

### Step 2: Analyze Each Vitamin
Next, we will analyze each vitamin to see if they contain any metal atoms:
- **Vitamin A**: Contains no metal.
- **Vitamin B12**: Contains cobalt (Co), which is a metal.
- **Vitamin C**: Contains no metal.
- **Vitamin D**: Contains no metal.
- **Vitamin K**: Contains no metal.

### Step 3: Conclusion
From our analysis, we find that Vitamin B12 is the only vitamin that contains a metal atom, specifically cobalt.

### Final Answer
Thus, the only vitamin with a metal atom in it is **Vitamin B12**.

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