`{:(Column-I("Metal"),column-II),((A)"Magnesite",(p)"Ore of magnesium"),((B)"Siderite",(q)"Ore of aluminium"),((C)"Corundum",(r)"Oxide ore"),((D)"Bauxite",(s)"Carbonate ore"):}`
Match

Answer

To solve the matching question regarding the ores and their corresponding types, we will analyze each metal and its associated ore step by step.

### Step-by-Step Solution:

1. **Identify the Ore of Magnesium:**
- **Ore:** Magnesite
- **Chemical Formula:** MgCO3
- **Type:** It is the ore of magnesium and also a carbonate ore.
- **Match:** A - P (Ore of magnesium)

2. **Identify the Ore of Aluminium:**
- **Ore:** Siderite
- **Chemical Formula:** FeCO3
- **Type:** This is not an ore of aluminium; it is a carbonate ore.
- **Match:** B - S (Carbonate ore)

3. **Identify the Ore of Aluminium (again):**
- **Ore:** Corundum
- **Chemical Formula:** Al2O3
- **Type:** This is an oxide ore of aluminium.
- **Match:** C - Q (Ore of aluminium) and C - R (Oxide ore)

4. **Identify Another Ore of Aluminium:**
- **Ore:** Bauxite
- **Chemical Formula:** Al2O3·2H2O
- **Type:** This is also an oxide ore of aluminium.
- **Match:** D - Q (Ore of aluminium) and D - R (Oxide ore)

### Final Matches:
- A - P (Magnesite is the ore of magnesium)
- B - S (Siderite is a carbonate ore)
- C - Q (Corundum is an ore of aluminium) and C - R (Corundum is an oxide ore)
- D - Q (Bauxite is an ore of aluminium) and D - R (Bauxite is an oxide ore)

### Summary of Matches:
- A → P
- B → S
- C → Q, R
- D → Q, R