The All-India Consumer Price Index Number for Agricultural Labourers and Rural Labourers (CPI-AL and CPI-RL) for the month of January 2023 increased by 3 and 2 points to stand at 1170 and 1181 points respectively. The base year for two indices is ____________.
1
1992-93
2
1990-91
3
1989-90
4
1986-87
5
2002-03