Concept:An electoral commission is the body that organises and supervises elections in a country.
Explanation:The main functions of an electoral commission include preparing and maintaining the voters' register.
Provision of electoral registers is therefore a direct duty of the commission.
Adjudicating election petitions is a judicial function, not an electoral commission function.
Disciplining civil service personnel is an administrative matter within the civil service.
Promotion of public servants is also not part of electoral duties.
Among the options, only the provision of electoral registers clearly belongs to an electoral commission.
Answer:B. provision of electoral registers