Tetrahedral complexes are generally favoured:

Options

A. where the ligands are bulky
B. when the ligands are stronger
C. where the electronic configuration of the central metal is `d^(0) d^(5) or d^(10)` (with weak field ligands ) as there is no CFSE.
D. when the central metal ion has pseudo noble gas electron configuration ,i.e,(n-1)`d^(10)ns^(0)np^(0)`

Explanation

To solve the question regarding the conditions under which tetrahedral complexes are generally favored, we will analyze each of the provided options step by step.

### Step-by-Step Solution:

1. **Understanding Tetrahedral Complexes**:
- Tetrahedral complexes are coordination compounds where the central metal atom is surrounded by ligands at the corners of a tetrahedron. The geometry is typically favored under certain conditions related to the nature of the ligands and the electronic configuration of the central metal.

2. **Analyzing Option 1**:
- **Statement**: Tetrahedral complexes are favored by large ligands.
- **Explanation**: It is known that tetrahedral complexes are generally favored by larger ligands (such as Cl⁻, Br⁻) because they can fit better in the tetrahedral arrangement due to steric factors.
- **Conclusion**: This option is **correct**.

3. **Analyzing Option 2**:
- **Statement**: Tetrahedral complexes are favored when the ligands are stronger.
- **Explanation**: Strong field ligands tend to cause a larger splitting of d-orbitals, which typically leads to octahedral complexes rather than tetrahedral. Tetrahedral complexes are favored by weak field ligands.
- **Conclusion**: This option is **incorrect**.

4. **Analyzing Option 3**:
- **Statement**: Tetrahedral complexes are favored when the electronic configuration of the central metal is D0, D5, or D10 with weak field ligands.
- **Explanation**: In tetrahedral complexes, weak field ligands do not cause significant splitting of the d-orbitals, which is consistent with the configurations mentioned (D0, D5, D10). Thus, this condition supports the formation of tetrahedral complexes.
- **Conclusion**: This option is **correct**.

5. **Analyzing Option 4**:
- **Statement**: Tetrahedral complexes are favored when the central metal ion has a pseudo noble gas electron configuration (N-1)D10, NS0, NP0.
- **Explanation**: Transition metals with a pseudo noble gas configuration (which implies a filled d-subshell) often form stable tetrahedral complexes, particularly when paired with weak field ligands.
- **Conclusion**: This option is **correct**.

### Final Answer:
Based on the analysis:
- **Correct Options**: Option 1, Option 3, and Option 4.