`{:("List-I",,"List-II"),("(P) Galena",,1. Fe_(2)O_(3)),("(Q)Cinnabar",,2.Al_(2)O_(3).2H_(2)O),("(R) Haematite",,3.HgS),("(S) Bauxite",,4. PbS):}`

Options

A. P-2, Q-3, R-4, S-1
B. P-4, Q-3, R-1, S-2
C. P-3, Q-2, R-1, S-4
D. P-4, Q-3, R-2, S-1

Answer

To solve the problem of matching the ores with their corresponding chemical formulas, we will go through each ore in List-I and identify its formula from List-II.

### Step-by-Step Solution:

1. **Identify Galena**:
- Galena is known to be the ore of lead (Pb).
- The chemical formula for Galena is **PbS**.
- Therefore, we match Galena (P) with option **4**.

2. **Identify Cinnabar**:
- Cinnabar is the ore of mercury (Hg).
- The chemical formula for Cinnabar is **HgS**.
- Therefore, we match Cinnabar (Q) with option **3**.

3. **Identify Haematite**:
- Haematite is an ore of iron (Fe).
- The chemical formula for Haematite is **Fe₂O₃**.
- Therefore, we match Haematite (R) with option **1**.

4. **Identify Bauxite**:
- Bauxite is the ore of aluminum (Al).
- The chemical formula for Bauxite is **Al₂O₃·2H₂O**.
- Therefore, we match Bauxite (S) with option **2**.

### Summary of Matches:
- (P) Galena → 4. PbS
- (Q) Cinnabar → 3. HgS
- (R) Haematite → 1. Fe₂O₃
- (S) Bauxite → 2. Al₂O₃·2H₂O

### Final Matching:
- P - 4
- Q - 3
- R - 1
- S - 2

### Conclusion:
The correct option that matches the ores with their formulas is option **2**.