The given options are "ओखली" (mortar), "एड़ी" (ladder), and "ऐनक" (glasses). Out of these options, "ऐनक" (glasses) is the correct answer as it is the only option that relates to the concept of identification. Glasses are often used to identify or recognize someone, either by the person wearing them or by the distinctive style or design of the glasses. The other options, "ओखली" (mortar) and "एड़ी" (ladder), do not have any direct relation to the concept of identification.