I would emphasise first that there is no best boois but only good books and what makes it best is the combination of the reader‘s talent and the book. Try finding the book and level you are comfortable with rather then just jumping to high end books.

The objective books I would suggest are:

Biology- Dinesh Objective Book, NCERT at your fingertips

Physics- DC Pandey for Medical , also JEE Mains competitive books from Arihant or MTG

Chemistry- Arihant or MTG competitive exams book for engineering

Why engineering level? To have a higher concept level for AIIMS and JIPMER exams. Along with these try getting involved in test series or mock tests either online or offline