HIV infection can be transmitted in dentistry by which of the following?

 # HIV infection can be transmitted in dentistry by which of the following? 

a. Inhalation of infected droplets. 

b. Contact with contaminated dental unit water supplies. 

c. Contact with skin. 

d. Use of infected instruments. 

The correct answer is D. Use of infected instruments. 

HIV infection can be transmitted in dentistry by the use of contaminated instruments, such as needles, dental handpieces, and other reusable instruments that are not properly sterilized. While the risk of transmission of HIV in dentistry is low, it is important for dental healthcare personnel to follow standard precautions, including proper sterilization of instruments and use of personal protective equipment, to prevent the transmission of HIV and other infectious agents. HIV is not transmitted through inhalation of infected droplets, contact with skin, or contact with contaminated dental unit water supplies, although these can be routes of transmission for other infectious agents.