In which of the following years were two additional Commissioners appointed to the Election commission of India for the first time?

1989

The correct answer is Option 2 - 1989

Two additional Commissioners were appointed to the Election Commission of India for the first time in 1989.
However, their tenure was very short, lasting only from October 16, 1989, to January 1, 1990. The concept of a multi-member Election Commission with a permanent additional two Election Commissioners became operational only in 1993.