Which of the following is an open-pit copper mine? 

The correct answer is Malanjkhand.Key Points

• Malanjkhand is an open-pit copper mine located in the Balaghat district of Madhya Pradesh, India.
• It is the largest copper deposit in India and one of the largest in the world.
• The mine is owned by Hindustan Copper Limited, a public sector undertaking under the Ministry of Mines, Government of India.
• The mining method used in Malanjkhand is an open pit or surface mining, which involves the removal of overlying rock and soil to access the copper ore.

Additional Information

• Bastar is a district in the Indian state of Chhattisgarh, which has significant reserves of iron ore and limestone.
• There are no copper mines in Bastar.
• Singhbhum is a district in the Indian state of Jharkhand, which has significant reserves of iron ore, coal, and copper.
• However, the copper mines in Singhbhum are underground mines, not open pit mines.
• Ballari is a district in the Indian state of Karnataka, which has significant reserves of iron ore, manganese, and limestone.
• There are no copper mines in Ballari.