Given below is the bond angle in various types of hybridisation. Mark the bond angle which is not correctly matched.

Options

A. `dsp^(2) - 90^(@)`
B. `sp^(3)d^(2) - 90^(@)`
C. `sp^(3) d - 90^(@)`
D. `sp^(3) - 109.5^(@)`

Explanation

To solve the question regarding the bond angles in various types of hybridization and identify the incorrectly matched bond angle, follow these steps:

### Step-by-Step Solution:

1. **Understand the Hybridization Types and Their Shapes**:
- **dsp² Hybridization**: This hybridization leads to a square planar shape. The bond angles in a square planar molecule are 90 degrees.
- **SP³D² Hybridization**: This hybridization results in an octahedral shape. The bond angles in an octahedral molecule are also 90 degrees.
- **SP³D Hybridization**: This hybridization gives rise to a trigonal bipyramidal shape. The bond angles in a trigonal bipyramidal molecule are 90 degrees between the axial and equatorial positions, but 120 degrees between the equatorial positions.
- **SP³ Hybridization**: This hybridization results in a tetrahedral shape. The bond angle in a tetrahedral molecule is 109.5 degrees.

2. **Check Each Option Against Known Bond Angles**:
- **Option 1 (dsp²)**: Bond angle is 90 degrees. This is correct.
- **Option 2 (SP³D²)**: Bond angle is 90 degrees. This is correct.
- **Option 3 (SP³D)**: Bond angle is given as 90 degrees. This is incorrect because the trigonal bipyramidal shape has bond angles of 90 degrees and 120 degrees.
- **Option 4 (SP³)**: Bond angle is 109.5 degrees. This is correct.

3. **Identify the Incorrectly Matched Bond Angle**:
- The only option that does not match the correct bond angle is **Option 3 (SP³D)**, which is incorrectly stated as having a bond angle of 90 degrees.

### Conclusion:
The bond angle that is not correctly matched is from **Option 3 (SP³D)**, which should include angles of both 90 degrees and 120 degrees, not just 90 degrees.