Hi Sreelakshmi,

As per the NEET UG 2019 eligibility criteria, the candidate must have passed their 10+2 with Physics, Chemistry , Biology and English as your Core subjects(in both 11 and 12) from a recognized board. And you need to sucure an aggregate of 50%(for general category students) in 12th boards.

Kerela State board is a well recognized board. You need not be an CBSE board student in order to be eligible for the NEET exam.

If you are talking of syllabus, in today's date all the boards have almost the same syllabus. In order to be thorough with the pattern of the NEET UG question paper, you have to practice a lot of previous years question papers and online mock tests which are easily available online.

For more information about the syllabus, you may follow the link below:-

https://medicine.careers360.com/articles/neet-syllabus

Hopefully this helps.