Inter-cisternal space is occupied by

Options

A. Cytosol
B. Cementing materials
C. Fibrils
D. All the above

Answer

To answer the question "Inter-cisternal space is occupied by," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Inter-cisternal Space**:
- The inter-cisternal space is the area between the cisternae of the Golgi apparatus. Cisternae are the flattened membrane-bound sacs that make up the Golgi body.

2. **Identifying the Components of the Inter-cisternal Space**:
- The inter-cisternal space is known to contain various materials that play a role in the function of the Golgi apparatus.

3. **Analyzing the Options**:
- **Option A: Cytosol**: This is the liquid component of the cytoplasm where various cellular processes occur. It is indeed present in the inter-cisternal space.
- **Option B: Cementing Materials**: These are substances that help to hold the structures together. They can also be found in the inter-cisternal space.
- **Option C: Fibrils**: These are thread-like structures that can provide support and organization within the cell. They are also present in the inter-cisternal space.

4. **Conclusion**:
- Since the inter-cisternal space contains cytosol, cementing materials, and fibrils, we can conclude that it is occupied by all of these components.

5. **Final Answer**:
- Therefore, the correct answer is **Option D: All the above**.