Sister, I am preparing for jee mains.And I am student of ISC board and my name is Sumit

I would suggest go through ncert first. After that do as many previous year papers as you can. you can read H.C. VERMA for physics. For chemistry, through revision of ncert is required and should be enough. R.D.Sharma is good for maths.But doing previous year paper is very important. Practice is the