In case the majority of the votes polled are for the NOTA above category then candidate having the highest score is elected from the constituency and the EC takes note of the dissent among the voters regarding the list available candidates in the constituency.
There are 10,000 voters in a constituency and and there are 4 candidates contesting the elections, the final count of the votes is as follows
Candidate B-2000 votes
Candidate A-1500 votes
Candidate C-300 votes
Candidate D-200 votes
In such a scenario, NOTA is taken into notice but, the candidate B is declared a winner.
So, why waste your precious vote and why not vote for someone who is really interested in doing good for the constituency, why not vote for an independent candidate who is really frustrated with other parties like yourself but, has decided top take the matter in her/his own hands and contest the elections.