Dear Pushpa,

Today 2nd June is the last date of challenging the one sheet.If you are very sure that 8 answer you marked were correct and are not displayed in one,you can challenge the one sheet.

The procedure for challenging one are as follows:-

1.Login with you application number and password on official neet site 

2.Click on OMR challenge option on left side of screen.

3.The number of questions answered will be displayed on the screen.

4.To challenge any response click on the box before the question number and also provide the alternative claim.

5.After marking all questions submit your claim.NO FURTHUR CHANCE WILL BE ALLOWED SO SEE THAT ALL QUESTIONS HAVE BEEN MARKED BY YOU.

You will The be retire ted to payment page.Amount to be paid is 1000 for each questions which is non refundable even if challenge is accepted.

So if you are very sure that you marked correct answer go for one claim as 8 questions can can be your neet AIR a lot.All the best!!

You should immediately report to NTA regarding this.