Co is present in which of the following vitamin?

Options

A. Vitamin-A
B. Vitamin-C
C. Vitamin-`B_(12)`
D. Vitamin-D

Answer

To determine which vitamin contains cobalt, we can follow these steps:

### Step 1: Identify the vitamins listed in the options.
The options provided are:
- Vitamin A
- Vitamin C
- Vitamin B12
- Vitamin D

### Step 2: Recall the chemical composition of the vitamins.
We need to know the chemical composition of each vitamin to identify if cobalt is present in any of them.

### Step 3: Analyze each vitamin.
- **Vitamin A**: This vitamin is primarily composed of retinol and does not contain cobalt.
- **Vitamin C**: Also known as ascorbic acid, it does not contain cobalt.
- **Vitamin B12**: Known as cyanocobalamin, this vitamin is unique because it contains cobalt in its structure.
- **Vitamin D**: This vitamin is derived from cholesterol and does not contain cobalt.

### Step 4: Conclude which vitamin contains cobalt.
From our analysis, we find that cobalt is present in Vitamin B12.

### Final Answer:
Cobalt is present in Vitamin B12.

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