Vitamin `B_(12)` Consists of which type of element?

Options

A. Co
B. Ni
C. Fe
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding Vitamin B12**: Vitamin B12 is also known as cobalamin. It is a water-soluble vitamin that plays a crucial role in various bodily functions.

2. **Identifying the Central Element**: The key to identifying what type of element is present in Vitamin B12 is to look at its name. The prefix "cobal" in cobalamin indicates the presence of cobalt.

3. **Functions of Vitamin B12**: Vitamin B12 is essential for the production of red blood cells (RBCs), DNA synthesis, and the proper functioning of the nervous system.

4. **Sources of Vitamin B12**: It is primarily found in animal-based foods such as meat, fish, and dairy products.

5. **Evaluating the Options**:
- Option 1: Cobalt - This is correct as it is the central metal ion in Vitamin B12.
- Option 2: Nickel - Incorrect, as nickel is not a component of Vitamin B12.
- Option 3: Iron - Incorrect, as iron is not present in Vitamin B12.
- Option 4: None of these - Incorrect, as cobalt is indeed present.

6. **Conclusion**: Therefore, the correct answer is that Vitamin B12 consists of cobalt.

**Final Answer**: Vitamin B12 consists of cobalt.

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