If your question is whether if you have passed your 12th in any subject with Grace marks, you are eligible for NEET. then yes you are. For being eligible for NEET, you should complete your 12th, pass in all subjects and secure a minimum aggregate of 50% in Physics, Chemistry and Biology. It is 50% for General Categiry, 45% for PWD and 40% for OBC,SC,ST. It is ok even if you pass with Grace marks but it is important you pass and secure the minimum aggregate required for your Category.