Which of the following is a secondary metabolite as well as a drug ?

Options

A. Concanavlin A
B. Vinblastine
C. lDiterpenes
D. Ricin

Answer

To solve the question "Which of the following is a secondary metabolite as well as a drug?" we need to analyze the options provided and determine which one fits both criteria.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Secondary Metabolite**: These are organic compounds that are not directly involved in the normal growth, development, or reproduction of an organism. They often have important ecological functions, such as defense mechanisms or signaling.
- **Drug**: A substance used to diagnose, cure, treat, or prevent disease.

2. **Evaluate the Options**:
- **Honabolin A**: This is not widely recognized as a drug or secondary metabolite in common literature.
- **Vinblastine**: This is a well-known drug used in cancer treatment. It is derived from the periwinkle plant and is classified as a secondary metabolite because it is not essential for the plant's basic metabolic functions.
- **Ioditerapines**: This is not a commonly recognized secondary metabolite or drug.
- **Racine**: This is not widely recognized as a drug or secondary metabolite.

3. **Identify the Correct Answer**:
- Among the options, **Vinblastine** is the only one that is both a secondary metabolite and a drug. It is used to treat cancer by inhibiting cell division.

4. **Conclusion**:
- Therefore, the correct answer to the question is **Vinblastine**.