To be eligible for NEET, you should have completed your 12th, passed in all subjects and secure a minimum aggregate of 50% in Physics, Chemistry and Biology. It is 50% for General Category, 45% for PWD and 40% for OBC,SC,ST. This 40% is inclusive of the Theory and Practical marks scored in Physics, Chemistry and Biology collectively. You needn't score 40% in Physics, 40% in Chemistry and 40% in Biology separately. You need an aggregate of 50% or 40% depending on your Category as an aggregate in Physics, Chemistry and Biology. And along with Physics, Chemistry and Biology, you should also have studied English as one of the core subjects in your 12th. With 49% in your 12th in Physics, Chemistry and Biology, you are eligible for NEET. It doesnt matter whether you have passed with or without Grace marks. You should have completed your 12th and passed in all subjects and i your case, it holds true and so you are eligible for NEET. Good luck:)