Which of the following duties can be performed under general supervision by a dental assistant?

A dental assistant operating under general supervision can perform dental radiography, which involves taking X-ray images of patients' teeth and jaw structures. This task is critical in dentistry as it aids the dentist in diagnosing conditions, planning treatments, and monitoring the health of the oral cavity. General supervision means that the dentist does not need to be physically present when the dental assistant performs the radiography. However, the dental assistant must still carry out these duties under the dentist's overall direction and supervision.

In contrast, the other duties listed – providing anesthesia, conducting oral surgeries, and diagnosing dental conditions – necessitate more advanced training or direct supervision from a licensed dentist, as they involve higher-level skills and professional judgment that are not appropriate for general supervision.