Mechanical support, enzyme circulation, protein synthesis and detoxification of durgus are the function of

Options

A. dictyosomes
B. chloroplast
C. ribosomes
D. ER.

Explanation

To answer the question regarding which organelle is responsible for mechanical support, enzyme circulation, protein synthesis, and detoxification of drugs, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Functions**: The question lists four specific functions: mechanical support, enzyme circulation, protein synthesis, and detoxification of drugs.

2. **Review the Organelles**: The options provided include Dictyosome, Chloroplast, Ribosome, and Endoplasmic Reticulum (ER). We need to analyze each organelle's functions.

3. **Analyze Dictyosome**: The Dictyosome (Golgi apparatus) is primarily involved in the transport and packaging of proteins. It does not perform all the functions listed.

4. **Analyze Chloroplast**: Chloroplasts are found in plant cells and are mainly responsible for photosynthesis. They do not contribute to the other functions mentioned.

5. **Analyze Ribosome**: Ribosomes are essential for protein synthesis, as they translate mRNA into proteins. However, they do not provide mechanical support or perform detoxification.

6. **Analyze Endoplasmic Reticulum (ER)**: The ER is divided into two types: Rough ER and Smooth ER.
- **Rough ER** has ribosomes on its surface and is involved in protein synthesis and enzyme circulation.
- **Smooth ER** is involved in detoxification of drugs and also contributes to the transport of synthesized proteins.

7. **Conclusion**: The Endoplasmic Reticulum (ER) is the organelle that performs all four functions: mechanical support, enzyme circulation, protein synthesis, and detoxification of drugs.

### Final Answer:
The correct answer is **Endoplasmic Reticulum (ER)**.

---