My marks in HS 2018 from AHSEC in science stream is Physics 50, Chemistry 51, Biology 60, English 50 am I elligble to get admission in MBBS

If full marks of each subject is 100, you have an aggregate score of 53.67. Hence you are eligible to appear for NEET UG Entrance Examination. In order to get an MBBS seat via NEET, you need to qualify NEET. Assuming you are a general candidate, you will need to secure 550-560+ in NEET out of 720, to get a seat in a decent government medical college.