Arrange the following agricultural developments in chronological order:
- Introduction of High Yielding Varieties (HYVs)
- Launch of the Intensive Agricultural District Programme (IADP)
- India became self-sufficient in foodgrains
- Droughts in mid-1960s leading to a food crisis
1
1, 2, 3, 4
2
2, 1, 4, 3
3
4, 1, 2, 3
4
1, 4, 2, 3