`{:(,"Column I",,"Column II"),(("A"),": CN :"^(-),(p),"Unidentate ligand"),(("B"),"glycinate",(q),"Didentate ligand"),(("C"),"ethylenediamine",(r),"Ambidentate ligand"),(("D"),"carbonate ion",(s),"Chelating ligand"):}`

Answer

To solve the problem, we need to match the ligands in Column I with their corresponding types in Column II. Let's analyze each ligand one by one.

### Step 1: Identify the Ligands

1. **A: CN⁻ (Cyanide ion)**
- CN⁻ is a unidentate ligand because it can form one bond with the metal center.

2. **B: Glycinate**
- Glycinate is a bidentate ligand because it has two donor atoms (the nitrogen and one of the oxygen atoms) that can bind to the metal center.

3. **C: Ethylenediamine (en)**
- Ethylenediamine is also a bidentate ligand as it contains two nitrogen atoms that can coordinate to the metal center.

4. **D: Carbonate ion (CO₃²⁻)**
- The carbonate ion can act as a bidentate ligand because it can bind through two oxygen atoms.

### Step 2: Match with the Types of Ligands

Now let's match each ligand with the correct type from Column II:

- **A (CN⁻)**: Unidentate ligand (p)
- **B (Glycinate)**: Didentate ligand (q)
- **C (Ethylenediamine)**: Didentate ligand (q)
- **D (Carbonate ion)**: Chelating ligand (s)

### Step 3: Final Matching

Based on the above analysis, we can summarize the matching as follows:

- A: CN⁻ → Unidentate ligand (p)
- B: Glycinate → Didentate ligand (q)
- C: Ethylenediamine → Didentate ligand (q)
- D: Carbonate ion → Chelating ligand (s)

### Final Answer

- A → p
- B → q
- C → q
- D → s