The chemical name of vitamin 'D' is:

Options

A. Ascorbic acid
B. Tocopherol
C. Cyanocobalmin
D. Calciferol

Explanation

To answer the question about the chemical name of vitamin D, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Vitamin**: We need to determine the chemical name of vitamin D. Vitamin D is a fat-soluble vitamin that plays a crucial role in calcium metabolism and bone health.

2. **Recall the Chemical Name**: The chemical name of vitamin D is "Calcium Feral." This name is derived from its function in calcium regulation in the body.

3. **Understand the Importance of Vitamin D**: Vitamin D is essential for maintaining healthy bones and teeth. Its deficiency can lead to diseases such as rickets, particularly in children, which causes bone deformities.

4. **Sources of Vitamin D**: Vitamin D can be obtained from dietary sources, but the primary source is sunlight. The body synthesizes vitamin D when the skin is exposed to sunlight.

5. **Eliminate Incorrect Options**: In the context of the question, we can eliminate other options:
- Ascorbic acid is the chemical name for vitamin C.
- Tocopherol refers to vitamin E.
- Vitamin B12 is known as cobalamin.

6. **Conclude with the Correct Answer**: Therefore, the correct answer to the question is "Calcium Feral," which is the chemical name of vitamin D.

### Final Answer:
The chemical name of vitamin D is Calcium Feral.

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