Which of the following statements is correct about irrigation being introduced in Stage I and Stage II of the Indira Gandhi Canal system?

a- Irrigation in the Stage-I command area of the canal was introduced in the early 1980s

b- Irrigation in the Stage-II command area of the canal began receiving water in the mid-1980s. 

Only statement b is correct.

Irrigation in the Stage-I command area of the canal was introduced in the early 1960s, whereas, the command area of Stage-II began receiving irrigation in the mid-1980s. The introduction of canal irrigation in this dry land has transformed its ecology, economy and society. It has influenced the environmental conditions of the region both positively as well as negatively.