which type books should o read? objective or subjective for JEE mains ..

In order to get good marks in JEE Main make sure your basics are clear you can take help of NCERT books for that. After, completing your NCERT you can recommended below books for your preparation Physics Concepts of Physics by H. C. Verma Fundamentals of Physics by Halliday, Resnick and Walker Problems in General Physics by I. E. Irodov University Physics by Freedman and Young Mathematics Higher Algebra by Hall and Knight for Algebra Coordinate Geometry by S.L. Loney Differential and Integral Calculus by N. Piskunov Calculus and Analytic Geometry by Thomas and Finney for Calculus IIT Mathematics by M.L. Khanna Course in Mathematics for IIT-JEE by Tata McGraw Hill publications Problems Plus in IIT Mathematics by A Das Gupta Trigonometry by S L Loney Chemistry University Chemistry by Freedman and Young for Physical Chemistry Organic Chemistry by Morrison and Boyd for Organic Chemistry Organic Chemistry by Solomons and Fryhle for Organic Chemistry Concise Inorganic Chemistry by J. D. Lee for Inorganic Chemistry Modern Approach to Chemical Calculations by RC Mukherjee All the Best!!

Ncert is best book for jee