Which of the following shows bond in silicone?

Options

A. `Si-C-Si-C-Si`
B. `Si-Si-Si-Si`
C. `-Si-O-Si-O-Si`
D. `Si-C-Si-O-Si.`

Explanation

To solve the question "Which of the following shows bond in silicon?", we need to analyze the types of bonds that are characteristic of silicon compounds.

### Step-by-Step Solution:

1. **Understanding Silicon Bonds**: Silicon primarily forms bonds with oxygen and other silicon atoms. The most common bond found in silicon compounds is the Si-O bond, which is prevalent in silicates and siloxanes.

2. **Identifying the Options**: The question likely provides several structural formulas or chemical representations. We need to look for the presence of Si-O bonds or Si-Si bonds.

3. **Analyzing the Structures**:
- **Option 1: Si-C-Si**: This structure indicates a silicon-carbon bond. While silicon can bond with carbon, this does not represent the typical bonding in silicon compounds.
- **Option 2: Si-Si**: This structure indicates a silicon-silicon bond. While Si-Si bonds can exist, they are not the primary type of bond in silicon compounds.
- **Option 3: Si-O-Si**: This structure indicates a silicon-oxygen-silicon linkage. This is characteristic of siloxanes and silicates, which are common in silicon chemistry.
- **Option 4: Any other structure**: This would need to be analyzed similarly to determine if it contains Si-O or Si-Si bonds.

4. **Conclusion**: After analyzing the options, we find that the structure with Si-O-Si linkages is the one that shows the bond in silicon. Therefore, the correct answer is **Option 3**.

### Final Answer:
The correct option that shows the bond in silicon is **Option 3 (Si-O-Si)**.