An agent that prevents infection by the destruction of pathogenic microorganisms when applied to inanimate objects:

• A. Antiseptic
• B. Disinfectant
• C. Sanitizer
• D. Antibiotic

Answer: (B)

Disinfectants are chemicals used on nonliving surfaces to destroy pathogenic microorganisms, thereby preventing infection. They’re applied to inanimate objects like countertops, equipment, and room surfaces to kill or inactivate microbes present there, reducing the chance of transmission.

Antiseptics, in contrast, are designed for living tissues—skin or mucous membranes—and reduce microbial load on those surfaces, not primarily for use on objects. Sanitizers lower microbial counts to safe levels on surfaces or utensils but aren’t guaranteed to destroy all pathogens. Antibiotics target microorganisms inside the body and aren’t used on surfaces.