Question Detail
Question
Which of the following is NOT a method of physical sterilization?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Quaternary ammonium compounds (Quats) are chemical disinfectants and antiseptics, not physical methods of sterilization. Ionizing radiation, autoclaving (moist heat), and filtration are all physical methods used for sterilization or microbial control.
Hint
Consider whether the method involves a chemical agent or a physical process like heat, radiation, or mechanical removal.