जब मुख्य रूप से प्राकृतिक संसाधनों के दोहन से किसी वस्तु का उत्पादन किया जाता है, तो वह अर्थव्यवस्था के किस क्षेत्र के अंतर्गत आता है?

Which of the following activities is NOT included in the Primary Sector of the economy?

Which of the following services/entities in India belonged to the private sector after privatization, unlike the other three which are public sector enterprises?