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प्रश्न
Read the following statements regarding open-cast mining and choose the correct option:
- This is the cheapest way of mining.
- The output is in large quantity.
- It requires specially designed lifts, drills.
- It requires special ventilation system.
पर्याय
Only I and II are correct.
Only III and IV are correct.
Only I and III are correct.
Only II and IV are correct.
MCQ
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उत्तर
Only I and II are correct.
Explanation:
Deep shaft mining is suitable for options III and IV.
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