Limitations of VBT

Q. Which of the following depict a $\sigma$-bond?

1. 

2. 

3. 

4. None of these

Q.

Which of the following depict a $\pi$-bond?

1. 

2. 

3. 

4. None of these

Q. Which of the following depict a $\sigma$-bond?

1. 

2. 

3. 

4. None of these

Q. Which of the following depict a $\sigma$-bond?

1. 

2. 

3. 

4. None of these