Which of the following is a zero overlap which leads to non-bonding?

Answer

To determine which of the following options represents a zero overlap that leads to non-bonding, we need to analyze the orientation and overlap of the atomic orbitals involved in bonding.

### Step-by-Step Solution:

1. **Understanding Orbital Overlap**:
- Bonding between atoms occurs when atomic orbitals overlap effectively. The greater the overlap, the stronger the bond. Non-bonding interactions occur when there is zero overlap between orbitals.

2. **Analyzing Option A**:
- In this option, we have p_x and p_y orbitals. These orbitals are oriented perpendicular to each other. Since they do not align properly, there is no overlap between them. Therefore, this results in zero overlap and leads to a non-bonding situation.

3. **Analyzing Option B**:
- In this case, the orbitals are properly oriented, allowing for effective overlap. This means that bonding can occur here, and thus this option does not represent a zero overlap.

4. **Analyzing Option C**:
- Here, we have a situation where bonding is also taking place. The orbitals involved are oriented in such a way that they can overlap, leading to the formation of a bond. Therefore, this option does not represent a zero overlap.

5. **Conclusion**:
- Based on the analysis, Option A is the only one that exhibits zero overlap, leading to a non-bonding situation.

### Final Answer:
**Option A** is the zero overlap which leads to non-bonding.