Correct statement about `VBT` is .

Options

A. Each bond is formed by maximum overlap for its maximum stability .
B. It represents localised electron modal of bonding.
C. Most of electrons retain the same orbital localisation as in a separate atom .
D. All are correct .

Answer

To solve the question regarding the correct statement about Valence Bond Theory (VBT), let's analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Valence Bond Theory (VBT)**:
- VBT explains how atomic orbitals overlap to form bonds between atoms. The strength and stability of a bond depend on the extent of this overlap.

2. **Analyzing Option A**:
- **Statement**: "Each bond is formulated by maximum overlap for its maximum stability."
- **Evaluation**: This statement is correct. In VBT, the greater the overlap of atomic orbitals, the stronger the bond formed. The bond formation continues until the system reaches a minimum energy state, indicating maximum stability.

3. **Analyzing Option B**:
- **Statement**: "It represents localized electron model of bonding."
- **Evaluation**: This statement is also correct. VBT emphasizes that electrons are localized in specific orbitals during bond formation. For instance, in a 2px orbital, the electron density is concentrated in a specific region, confirming the localized nature of electrons.

4. **Analyzing Option C**:
- **Statement**: "Most of the electrons retain the same orbital localization as in the separate atom."
- **Evaluation**: This statement is correct as well. When atomic orbitals overlap to form bonds, the electron density remains largely confined to the regions of the original orbitals, indicating that the electrons retain their localization.

5. **Conclusion**:
- Since options A, B, and C are all correct statements about VBT, the question asks for the correct statement. Therefore, the answer is that all provided statements (A, B, and C) are correct regarding Valence Bond Theory.

### Final Answer:
- The correct statements about Valence Bond Theory (VBT) are:
- A: Each bond is formulated by maximum overlap for its maximum stability.
- B: It represents localized electron model of bonding.
- C: Most of the electrons retain the same orbital localization as in the separate atom.