With reference to the ‘None of the Above’ (NOTA) option in Indian elections, consider the following statements:

I. The NOTA option enables an elector to register disapproval of all contesting candidates without invalidating the ballot.

II. A constituency election is rendered void if NOTA secures the highest number of votes.

III. The introduction of NOTA flows from judicial interpretation of the right to freedom of expression under Article 19(1)(a).

Which of the statements given above is/are correct?