Arrange the following key events in India's economic history in chronological order:
1
Implementation of GST, Introduction of Five-Year Plans, Establishment of NITI Aayog
2
Introduction of Five-Year Plans, Establishment of NITI Aayog, Implementation of GST
3
Establishment of NITI Aayog, Introduction of Five-Year Plans, Implementation of GST
4
Implementation of GST, Establishment of NITI Aayog, Introduction of Five-Year Plans