Which of the following secondary metabolites are wrongly matched with their categories?
A. Toxin - Ricin
B. Drug - Curcumin
C. Alkaloid - Codeine
D. Lectin - Abrin

Options

A. Only A
B. A and B both
C. A and C both
D. Only D

Answer

To solve the question "Which of the following secondary metabolites are wrongly matched with their categories?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Analyze Option A: Toxin - Ricin**
- Ricin is indeed a toxin derived from the seeds of the castor oil plant (Ricinus communis). It is known for its high toxicity.
- **Conclusion**: This pairing is correctly matched.

2. **Analyze Option B: Drug - Curcumin**
- Curcumin is the active compound found in turmeric (Curcuma longa) and is known for its medicinal properties, including anti-inflammatory and antioxidant effects.
- **Conclusion**: This pairing is also correctly matched.

3. **Analyze Option C: Alkaloid - Codeine**
- Codeine is an alkaloid that is derived from opium and is used as a pain reliever. It is classified as an alkaloid due to its nitrogen-containing structure.
- **Conclusion**: This pairing is correctly matched.

4. **Analyze Option D: Lectin - Abrin**
- Abrin is a toxic protein found in the seeds of the rosary pea (Abrus precatorius). It is classified as a lectin.
- **Conclusion**: This pairing is correctly matched.

### Final Conclusion:
After analyzing all the options, we find that all the pairs are correctly matched with their respective categories. Therefore, there are no wrongly matched pairs in the options provided.

### Answer:
None of the options are wrongly matched.