Which LDAP object class is used in a white pages implementation?

`friendlyPerson` is not a standard LDAP object class.

`organizationalRole` is used to represent a specific role within an organization, not an individual person for general white pages.

`posixAccount` is primarily used for representing Unix-like user accounts with attributes such as UID and GID, not for general contact information in a white pages directory.

The `inetOrgPerson` object class is a widely adopted standard schema definition within LDAP, combining attributes from `organizationalPerson`, `person`, and `top` to represent an individual user. It is specifically designed for directory entries that serve a 'white pages' function, providing comprehensive contact information for individuals in a network or organization.

`whitepageUser` is not a standard LDAP object class.