Infection Control · single question
Which agent is the stronger (higher-level) disinfectant?
Show answer and explanation
Correct answer: A. Phenol (phenolic)
- A. Correct. Phenolics are intermediate-to-high level disinfectants effective against a broad range of organisms and remain active on contaminated surfaces.
- B. Alcohols are intermediate-level, evaporate quickly, fix proteins/debris, and are not ideal surface disinfectants.
- C. Soap cleans (reduces load) but is not a disinfectant.
- D. Water has no antimicrobial action.
Note: Both phenol and alcohol are intermediate-level; phenolics are favored as the better surface disinfectant in this comparison.
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