Hey student

The NCERT syllabus usually does not change too frequently like the private publications' books.

But the improvements and new questions are updated from time to time in NCERT books.

So, I'd suggest you to go to official website of NCERT and find out the biology eBook. From there, you can match the content of the latest book with the old book you own, and if they match, you can use that book only.

NCERT website (https://ncert.nic.in/ebooks)

Hope this will help.