Explanation:

The Vice-President is chairman of Rajya Sabha. He holds office for a term of five years from the date on which he enters upon his office. However, he can resign from his office at any time by addressing the resignation letter to the President. He can also be removed from the office before completion of his term. A formal impeachment is not required for his removal. He can be removed by a resolution of the Rajya Sabha passed by an effective majority (i.e., a majority of the then members of the House i.e. total members excluding vacancies) and agreed to by the Lok Sabha. But, no such resolution can be moved unless at least 14 days’ advance notice has been given. Notably, no ground has been mentioned in the Constitution for his removal. Hence option 1st is correct.