UPSC Prelims 2015 Question:

In India the steel production industry requires the import of

Explanation: 

• Coking coal is an essential raw material for the making of steel. Indian steel makers do not get them adequately from domestic sources. Hence, India has to import it from abroad.
  
  
• It is a crucial component used in the production of steel. Coke is made from coking coal by removing impurities and leaving practically pure carbon. Iron ore, coke, and trace amounts of flux are fed into a blast furnace during the production of iron (minerals, such as limestone, which are used to collect impurities).
  
  
• Saltpetre and rock phosphates are used in the production of fertilzers.
  
  

Therefore, option (3) is the correct answer.

Subject: Economics | Industry