hello muskan,

you can appear for NEET exam only after you pass 12th grade,To fulfill the NEET eligibility criteria 2018, candidate must have passed in Physics, Chemistry, Biology/Bio-technology and English. The candidates belonging to General Category should score a minimum of 50% marks in Class 12 or HSC examination.Candidates who belong to Scheduled Caste/Scheduled Tribes or Other Backward Classes (OBC) should score a minimum of 40% in their Class 12 or HSC examination.For persons with locomotor disability of lower limbs, a minimum of 45% marks for General-PH and 40% marks for SC-PH/ST-PH/OBC-PH are required.

hope it helped.