The metal present in vitamin B12 is :

Question

Accepted Answer

Vitamin B12, also known as cobalamin, is a crucial vitamin for the human body, playing a significant role in the formation of red blood cells and the maintenance of the nervous system. The metal present in vitamin B12 is cobalt, which is why it is often referred to as cobalamin. Cobalt is an essential component of the vitamin's structure, forming the central part of the corrin ring, which is a complex molecular structure that allows vitamin B12 to function effectively in biological processes.

Now, let's examine why the other options are incorrect:

1. **Sodium**: Sodium is an essential electrolyte in the body, important for maintaining fluid balance and nerve function. However, it is not a component of vitamin B12. Sodium does not play a role in the structure or function of this vitamin.

3. **Magnesium**: Magnesium is another vital mineral in the body, involved in numerous biochemical reactions, including energy production and protein synthesis. However, it is not part of the vitamin B12 molecule. Magnesium is not involved in the structure or function of vitamin B12.

4. **Iron**: Iron is crucial for oxygen transport in the blood as a component of hemoglobin. While iron is essential for many bodily functions, it is not present in vitamin B12. Iron does not contribute to the structure or function of vitamin B12.

In conclusion, cobalt is the correct answer because it is the metal that is integral to the structure of vitamin B12, making Option 2 the correct choice.