i have 49.11 percent in pcb without grace marks .i have grace marks in physics and chemistry.can grace marks make ineligible for neet to me?if there is Grace marks can't i get mbbs admission?i am sc category student . please answer

Yes you are eligible for Neet ug for try to get admission in in south india like karnataka (KEA) Apply top and old colleges you can write dispardo23 at geemail dot com

Hii!
There is no segregation between grace marks and and marks without it in the NEET UG entrance exam. Its just that you should have scored enough to be able to apply for the exam, that is, to be eligible for the exam. So, your marks will be counted along with the grace marks. The Eligibility criteria for the NEET UG Entrance exam states that the Candidate must have passed class 12th with minimum aggregate of  50% marks ( general category ) and 40% - 45% marks ( reserved category ) in PCB and English Subject ombinations from a recognised Board of education, to be eligible for the exam.  Since, you belong to SC caste, you get benefit. You are eligible for the exam and will not dave any problem.
Hope this helps.
Good luck!