Question Detail
Question
Which of the following is NOT a method of physical sterilization?
Correct Answer
Option D is the correct answer.
Detailed Explanation
Autoclaving (moist heat), ionizing radiation, and filtration are all physical methods of sterilization or removal of microbes. Quaternary ammonium compounds (Quats) are chemical disinfectants and antiseptics, not a physical method of sterilization.
Hint
Physical methods involve heat, radiation, or mechanical removal. Chemical methods use antimicrobial agents.