Hey,

Yes as they are asking for the seat number and there is no such thing mentioned on our marksheet of class 12th . So yes it definitely the roll number of your class 12th which they are asking.

You need to fill your class 12th roll number in the seat number column.

Still if you are having doubts I will suggest you to contact them via email or helpline number available on their website.

Hope that helps.

Thank you.