Question

Read the following statements regarding open-cast mining and choose the correct option:

1. This is the cheapest way of mining.
2. The output is in large quantity.
3. It requires specially designed lifts, drills.
4. It requires special ventilation system.

विकल्प

• Only I and II are correct.

• Only III and IV are correct.

• Only I and III are correct.

• Only II and IV are correct.

Answer 1

Only I and II are correct.

Explanation: 

Deep shaft mining is suitable for options III and IV.