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