Hello there. Hope you are doing good. I would like to tell you that there are books available to purchase as of now. PDF version has not been updated on the website right now. There is a PDF link on the official website that contains solutions of few sample papers. I am sharing the link with you. Please check it if it can be of any use for you or not.

http://www.oswaalbooks.com/download/sample-qp/class12/h1444830054lsolution%206-10.pdf

I hope you found this answer helpful. Good luck for your future.