Which of the following is a secondary metabolite as well as a drug ?
1) Concanavalin
2)Vinblastine
3)Diterpenes
4)Ricin

Options

A. Concanavalin A
B. Vinblastine
C. Diterpenes
D. Ricin

Answer

To solve the question of which of the following is a secondary metabolite as well as a drug, we will analyze each option provided:

1. **Concanavalin**: This is a lectin derived from the jack bean (Canavalia ensiformis). While it has some biological activities, it is primarily known for its role in plant biology and is not classified as a drug.

2. **Vinblastine**: This is a well-known alkaloid derived from the periwinkle plant (Catharanthus roseus). Vinblastine is used in chemotherapy to treat various types of cancer, making it both a secondary metabolite and a drug.

3. **Diterpenes**: This is a class of chemical compounds composed of four isoprene units. While some diterpenes may have medicinal properties, they are a broad category and not a specific drug.

4. **Ricin**: This is a highly toxic protein derived from the seeds of the castor oil plant (Ricinus communis). It is not used as a drug due to its toxicity.

Based on the analysis, the only option that is both a secondary metabolite and a drug is **Vinblastine**.

**Final Answer**: Option 2) Vinblastine