The Vice-President of India holds office:

Which of the following is/are correct?

I. No formal impeachment is required for the removal of the Vice-President.

II. No functions are attached to the office of the Vice-President as such.

III. Dispute regarding election of Vice-President is referred to the Election Commission.

IV. If the election of a President or the Vice President is declared void acts done by him prior to the date of such decision shall be invalidated.