It would be difficult to list last 4 year changes. However I would suggest you to refer latest books, Practice manuals and Revision Test Papers as there are small amendments in almost all the subjects.
You may be spending a little more money, but that can fetch you extra marks for sure. Hence, pick latest recommended book applicable for November 2015 attempt along with Practice manuals and Revision Test Papers uploaded or to be uploaded by ICAI for November 2015 exams.
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