Hi aspirant

This is really good that you are PCMB student and you have scored so well in JEE mains also.

Yes you can expect a good rank if you focus now more on biology.As you have given JEE, your concepts of physics and chemistry is good .So you need now to give more time to biology.

It happens with most of students that their physics is not thats why they lack good score in NEET.

I suggest you to practice numericals of physics and chemistry more and more until NEET exam.And focus more on the concepts of biology.

Hope this helps you.