Dear Vaishnavi,

Don't worry it's very simple. In NEET UG examination form we need to fill our 12th class roll no. But you now have two different marksheet with two different roll numbers and both of them are valid but you can use the details from only one of them, don't mix . So you should fill only the roll no of that marksheet which have more marks. If your marks improved in those subjects then you should fill all the details from the new marksheet. Otherwise you can fill it from the old marksheet.

The main point is that use details from only one marksheet because during counselling session your original marksheet will be verified when you will get any seat in a medical college. So fill all details from any one of the marksheet which have more marks in the required subjects.

Hope this answers your query

Thank you