भारत सरकार ने नए आर्थिक सुधारों (LPG) की प्रक्रिया आधिकारिक तौर पर कब शुरू की?

How did the Indian government primarily enforce the policy of 'Import Substitution' prior to the 1991 economic reforms?

Which among the following reforms are directly aimed at improving the 'Ease of Doing Business' in India? (a) Regulating use of natural resources by National Green Tribunal (b) Passage and implementation of the Insolvency and Bankruptcy Code (IBC) (c) Abolishing the Foreign Investment Promotion Board (FIPB)