Question

how did robert ledley use informatics in the 1950s?
to identify infections
to track dental projects
to manage health records
to prevent bacterial infections
retry

Explanation:

Robert Ledley, in the 1950s, used informatics in the context of dental projects. Among the options, "to track dental projects" aligns with his work in applying informatics to dental research and projects. The other options like identifying infections, managing health records (though related to informatics in healthcare broadly, his 1950s work was more focused on dental projects), and preventing bacterial infections are not as accurate for his 1950s informatics application.

Answer:

B. to track dental projects