How are primary dentitions identified?

Primary dentitions are identified using a specific set of letters, which traditionally range from A to T. This system categorizes the primary teeth, which consist of 20 teeth in total. This alphabetical designation helps differentiate primary teeth from permanent teeth, which are numbered from 1 to 32.

The other options provide incorrect identification methods. For instance, numbering from 1 to 20 corresponds to the primary teeth but does not use a universally accepted system in dental practice. Also, using animals and plants does not have any relevance in dental identification. The correct choice of A to T is a standard in dentistry specifically for primary teeth, ensuring clarity and ease of communication among dental professionals.