Which is not available from plants

Options

A. Riboflavin
B. Vitamin `B_(12)`
C. Niacin
D. Vitamin C

Answer

To determine which vitamin is not available from plants among the given options, we can analyze each vitamin:

1. **Riboflavin (Vitamin B2)**:
- Riboflavin is found in various plant sources such as green leafy vegetables, nuts, and grains. Therefore, it is available from plants.

2. **Niacin (Vitamin B3)**:
- Niacin can be synthesized by the body from the amino acid tryptophan, and it is also present in many plant foods like legumes, seeds, and grains. Thus, niacin is available from plants.

3. **Vitamin C**:
- Vitamin C is abundant in many fruits and vegetables, such as oranges, strawberries, and bell peppers. Hence, vitamin C is available from plants.

4. **Vitamin B12**:
- Vitamin B12 is primarily found in animal products such as meat, fish, eggs, and dairy. It is not naturally present in plant foods. Therefore, vitamin B12 is not available from plants.

Based on this analysis, the vitamin that is not available from plants is **Vitamin B12**.

**Final Answer**: Vitamin B12