Hello Divya,

You must have an aggregate of 50% marks in the 10+2 qualifying examination or equivalent examination and Mathematics being the compulsory subject. For further reference you can go through the brochure and refer to page number 6 for the eligibility criteria or you can go through our article on Eligibility criteria of NATA 2019 from the below mentioned link:

Eligibility Criteria of NATA: https://engineering.careers360.com/articles/nata-eligibility-criteria

All the best! 

As per the eligibility you need to scored minimum 50% marks in aggregate in physic, chemistry and mathematics in 10+2. You can check the complete information about the eligibility  with the given below link.

https://engineering.careers360.com/articles/nata-eligibility-criteria

Good Luck!