Explanation:

- The election for the Vice-President of India should occur before the current Vice-President's term ends.

- It's important to ensure there's no gap between the terms.

- The options given refer to different timeframes for holding this election, relative to the expiration of the current Vice-President's term.

- Option 1: 75 days - This suggests organizing the election within 75 days of the term ending.

- Option 2: 60 days - This timeframe proposes completing the election within 60 days.

- Option 3: 90 days - This suggests arranging the election within 90 days.

- Option 4: 120 days - Specifies that the election be completed in 120 days after the term ends.

- Answer: Option 3: 90 days

The correct timeframe is within 90 days of the outgoing Vice-President’s term. Therefore, "".