Which of the following represents incorrect representation of defect in crystals?

Options

A.
B.
C.
D.

Explanation

To determine which option represents an incorrect representation of defects in crystals, we will analyze each option step by step.

### Step 1: Analyze Option 1
- **Description**: A crystal lattice contains cation A⁺ and anion B⁻. In the third row, there is a cation A²⁺, and there is a vacancy in the second row.
- **Analysis**: The presence of cation A²⁺ indicates a higher oxidation state, suggesting a metal excess defect due to the absence of A⁺ in the second row. This defect is valid.
- **Conclusion**: Option 1 is correct.

### Step 2: Analyze Option 2
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