Question

Match the items in Group I with the corresponding items in Group II. 

Group I                       Group II 
P. Chalcocite                1. Supergene enrichment 
Q. Bauxite                     2. Mechanical accumulation 
R. Monazite placers      3. Magmatic crystallization 
S. Chromite                   4. Residual processes 
 

• A. P–1; Q–4; R–2; S–3
• B. P–2; Q–3; R–4; S–1
• C. P–2; Q–4; R–1; S–3
• D. P–1; Q–3; R–2; S–4

Hint:

Chalcocite → Supergene; Bauxite → Residual; Monazite → Placer; Chromite → Magmatic.

Answer 1

The Correct Option is B

Step 1: Matching ore genesis processes.
- Chalcocite (Cu₂S): Forms by secondary enrichment — Supergene enrichment.
- Bauxite (Al ore): Residual product of intense weathering — Residual process.
- Monazite placers (REE-bearing): Concentrated by river/wave action — Mechanical accumulation.
- Chromite (FeCr₂O₄): Forms in mafic-ultramafic bodies — Magmatic crystallization.
Step 2: Matching.
P–1 (Chalcocite–Supergene enrichment), Q–4 (Bauxite–Residual), R–2 (Monazite–Mechanical), S–3 (Chromite–Magmatic).
Step 3: Conclusion.
Hence, the correct answer is (A).