which is best arihant ncert or mtg ncert solution?

Both the books are very good, Hoever Arihant NCERT books are more recommended as they contain relevant problems and saves time and is more appealing to majority of JEE aspirants.

This book has compaartively systematic approach and gives a good flow of topics such that preparationn goes smooth enough.

You need to be clear and concise with NCERT books first and only then you should go for advanced books for more complex problems which are highlights of JEE Advanced exam.

Some top books suggested for preparation are:

Physics:-

Concepts of Physics Vol I and II by H.C. Verma

New Pattern JEE Problems: Physics by DC Pandey.

Chmeistry:-

Organic Chemistry by O.P. Tandon

Numerical Chemistry by P.Bahadur

Mathematics:-

Maths XI & XII by R.D. Sharma

Both are good books and having good solutions it totally depends on student which book he/she prefer. Some students prefer Arihant and some students prefer MTG. If you want you can initially go for Arihant and after that you can go for MTG.

To score good marks make sure your basics are clear. You should complete your NCERT books first. Refer previous year papers to understand the exam pattern and level of questions. Solve as many as mock test series to analyze your preparation leve at regular interval of time.

All the Best!!