Vitamin A is

Options

A. ascorbic acid
B. retinol
C. calciferol
D. thiamine

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks for information about Vitamin A.

2. **Scientific Name**: The scientific name of Vitamin A is **retinol**.

3. **Sources of Vitamin A**: Vitamin A can be found in various food sources, including:
- Fish liver
- Carrots
- Butter
- Milk

4. **Deficiency Diseases**: The deficiency of Vitamin A can lead to certain diseases, primarily:
- **Night blindness**: A condition where one has difficulty seeing in low light or darkness.
- **Xerophthalmia**: A more severe condition characterized by the hardening of the cornea, which can lead to blindness if untreated.

5. **Evaluate Options**: If there are multiple-choice options provided, we need to evaluate them:
- **Option 1**: Ascorbic acid - Incorrect (this is Vitamin C)
- **Option 2**: Retinol - Correct (this is Vitamin A)
- **Option 3**: Calcium ferrol - Incorrect (this is Vitamin D)
- **Option 4**: Thiamine - Incorrect (this is Vitamin B1)

6. **Conclusion**: The correct answer is **retinol**, which is the scientific name for Vitamin A.