hey Amit, candidates in 12th  level must have secured minimum 50% marks for general category,45% for PH and 40% marks for Sc/st category candidates in pcb group. since you satisfy the criteria of percentage in pcb group so dear you are eligible for the next neet exam for sure 

Hi

To appear for NEET Examination you must qualify the Eligibility Criteria for the exam. You should have secured 50% overall in the 12th Board Examination. So, you qualify the Eligibility Criteria for the exam. 

You can always check the NEET Eligibility Criteria 2019 in a greater detail through this link: https://medicine.careers360.com/articles/neet-eligibility-criteria.

Best of Luck. 

Hope this helps.

Cheers!