MATHS - I would refer R.S AGARWAL OF CLASS 11TH AND 12TH… Just stick to basics of the chapter in syllabus.. Also Go for QUANTITATIVE APTITUDE of R.S AGARWAL

REASONING - VERBAL AND NON- VERBAL APTITUDE of R.S AGARWAL and Also solve CLAT materials for reasoning section

ENGLISH- Go for ARIHANT AND S.CHAND materials and Also solve OXFORD'S materials

G.K AND BUSINESS AFFAIRS- Read NEWSPAPERS AND MAGZINES… G.K TODAY will be preferable and play online quiz on current affairs on quiz today

Practice as much questions as you can and stick with basics especially in Maths and English and there you go…

Best of Luck. Thank you.