Hii ravi

Its cool that you are going ahead in improvement exam while if you get the percentage above 60 you would be safer side as well , while you will be eligible when you cross the 50 percentage for safer side in NEET admission as you can show your improvement marks to NEET when you are under going councilling.

But on categories wisewis - 50%, OBC/SC/ST - 40%, PWD - 45% (minimum aggregate marks only for PCB subjects)

Kindly see the below link 

https://medicine.careers360.com/articles/neet-eligibility-criteria/amp

Regards