Which of the following is an example of an antiseptic?

An antiseptic is defined as a substance that inhibits the growth of microorganisms on living tissues, thereby helping to prevent infection. Handwashing procedures typically involve the use of soap and water or alcohol-based hand sanitizers, both of which are designed to reduce the number of pathogenic microorganisms present on the skin. This makes handwashing a critical practice in infection control, as it contributes to maintaining hygiene and preventing the transmission of infections in dental settings.

While bleach for surface cleaning is effective as a disinfectant, it is used on inanimate objects and surfaces rather than on living tissues, thus not qualifying as an antiseptic. Sterilization by autoclave eliminates all forms of microbial life, including spores, and is used for instruments rather than skin or soft tissue. Protective dental gear, such as gloves and masks, serves to prevent the spread of infection but does not actively kill or inhibit microbes on the skin. Therefore, handwashing is the correct choice as it directly involves the use of antiseptic methods for skin disinfection.