Is NCERT books are sufficient to score 200 in jee mains?
NCERT books are not sufficient to complete your syllabus & score well in the exam it will help you to build your concept. Here are some of the books name you can prefer.
Physics : Concept of Physics by H.C. Verma , Fundamentals of Physics by DC Pandey , Problems in Physics by I.E. Irodov
Chemistry : Numerical problems in Chemistry by P. Bahadur, Organic Chemistry by O.P. Tandon.
Mathematics : Mathematics by R.D. Sharma, Algebra by Hall & Knight
Good Luck!