In Bihar, the final voter list is out – it has 7.4 crore names. But getting here wasn’t easy. The Election Commission (EC) carried out something called a “special intensive revision” (SIR) of the list...
source https://timesofindia.indiatimes.com/blogs/gen-zedits/exam-begins-for-sir-2/
source https://timesofindia.indiatimes.com/blogs/gen-zedits/exam-begins-for-sir-2/