Dear aspirant,

If you were to take my opinion then kindly solve previous year question for practice. And also do take the test series of the Allen.

For mathematics , you can get the handbook of Allen online and just memorize formulas properly and practice as much as you can.

For chemistry, kindly get through ncert text books properly and solve the questions of pvq.

For physics, follow the dc Pandey series that would be enough to grasp your topic.