The pair of coordination complexes//ion exhibiting the same kind of isomerism is (are) .

Options

A. a.`[Cr(NH_(3))_(5)Cl]Cl_(2)` and `[Cr(NH_(3))_(4)Cl_(2)]Cl`
B. b.`[Co(NH_(3))_(4)Cl_(2)]^(o+)` and `[Pt(NH_(3))_(2)(H_(2)O)Cl]^(o+)`
C. c.`[CoBr_(2)Cl_(2)]^(2-)` and `[PtBr_(2)Cl_(2)]^(2-)`
D. d.`[Pt(NH_(3))_(3)(NO_(3))]Cl` and `[Pt(NH_(3))_(3)Cl]Br`

Explanation

To solve the question of identifying pairs of coordination complexes or ions that exhibit the same kind of isomerism, we will analyze each option provided and determine the type of isomerism they exhibit.

### Step 1: Analyze Option 1
- **Complex**: [Cr(NH3)Cl3]
- **Isomerism**: This complex has only one Cl ion and does not have enough ligands to form geometrical isomers (cis/trans). Therefore, it does not exhibit any isomerism.

**Hint**: Look for the number and type of ligands to determine if geometrical isomers can form.

### Step 2: Analyze Option 2
- **Complex**: [Co(NH3)4Cl2]
- **Isomerism**: This complex can exhibit geometrical isomerism (cis/trans) due to the presence of two identical Cl ligands. Thus, it can form different spatial arrangements.

**Hint**: Identify if the ligands can be arranged differently in space to form isomers.

### Step 3: Analyze Option 3
- **Complex**: [CoBr2Cl2]
- **Isomerism**: Similar to option 1, this complex does not have the necessary arrangement to form geometrical isomers. Therefore, it does not exhibit isomerism.

**Hint**: Check if there are identical ligands that can be positioned differently.

### Step 4: Analyze Option 4
- **Complex**: [Pt(NH3)3Cl(NO3)]
- **Isomerism**: This complex can exhibit ionization isomerism because the Cl and NO3 can switch positions between being inside and outside the coordination sphere.

**Hint**: Ionization isomerism occurs when there is a possibility of exchanging ligands between the coordination sphere and the outside.

### Conclusion
After analyzing all options:
- **Option 1**: No isomerism
- **Option 2**: Geometrical isomerism
- **Option 3**: No isomerism
- **Option 4**: Ionization isomerism

The pairs of coordination complexes that exhibit the same kind of isomerism are **Option 2 (Geometrical isomerism)** and **Option 4 (Ionization isomerism)**.

### Final Answer
The pairs of coordination complexes exhibiting the same kind of isomerism are **Option 2 and Option 4**.

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