Besides NCERT u can also use other guides like Arihant, Dinesh,Pradeeps etc to score good marks in NEET.

Hey friend...

Biology
Pradeep

Chemistry
Abc of chemistry  ( a complete source to study for )
Pradeep

Physics
H C Verma
Mcqgraw hill's concepts in physics
S  L arora ( best one ) it has a section which has questions asked in entrance exams ....

Also do more and more practice ....u need it ......all the best

Dear Thriveni
For Biology:
Trueman's Biology Vol 1 and 2
Objective Biology by Dinesh
For Physics :
Concepts of Physicsby H. C. Verma
D C Pandey Objective Physics
For chemistry :
Physical Chemistry by O.P. Tandon
Organic Chemistry by Morrison and Boydfor Organic Chemistry.
It's all not belongs to book but it depends upon the practice.  Practice many models as you can. 
All the best.

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