The correct answer is option 4 - Karnataka. The Delimitation is the process of redrawing the boundaries of parliamentary and assembly constituencies in order to ensure equal representation for all citizens. It is done to account for population changes that may have occurred since the last delimitation exercise.

In this case, Karnataka was the first state to go to polls after the Delimitation exercise. This means that the boundaries of the parliamentary and assembly constituencies in Karnataka were redrawn before the elections. This helps to ensure that each constituency has approximately the same number of voters, which is crucial for a fair and equitable democratic process.