Why are both identity verification and electoral roll matching considered necessary at a polling station?

Correct answer: To confirm eligible voter and genuine person

Correct answer: B. The electoral roll answers one question: is this person listed as an eligible voter for the relevant constituency or polling station? Identity verification answers another: is the person present actually the individual connected with that voter record? Using both checks helps prevent impersonation and voting by someone who is not entitled to vote. B is correct because it combines eligibility and genuine identity. A is wrong because verification may take time; speed is not its main purpose. C is wrong because candidates are not reduced through voter verification. D is wrong because these checks do not change the counting centre. A common confusion is to treat a name in the roll as sufficient by itself; the process also requires identity to be established according to the applicable rules.