Option 1: The year mentioned is 1962. However, this is not the correct answer. The first mid-term elections for Lok Sabha were not held in 1962.

Option 2: The year mentioned is 1971. This is the correct answer. The first mid-term elections for Lok Sabha were indeed held in 1971. Mid-term elections are held when the Lok Sabha is dissolved before the completion of its full term of five years.

Option 3: The year mentioned is 1977. Although mid-term elections were held in 1977, this was not the first time mid-term elections took place for Lok Sabha.

Option 4: The year mentioned is 1980. Mid-term elections were not held in 1980. Hence, this is not the correct answer.

In conclusion, option 2 (1971) is the correct answer as it accurately identifies the year in which the first mid-term elections for Lok Sabha were held.