The need to safeguard the right to vote

What did the Supreme Court say about electoral rolls revision in Bihar? Is the right to vote a fundamental right in India? Can electoral roll errors invalidate an election? How can India balance electoral vigilance with the inclusion of genuine voters?

​What did the Supreme Court say about electoral rolls revision in Bihar? Is the right to vote a fundamental right in India? Can electoral roll errors invalidate an election? How can India balance electoral vigilance with the inclusion of genuine voters?