101.
All of the following are methods of sterilisation EXCEPT
Answer: D
Correct answer: Laminar airflow
A laminar flow cabinet maintains a sterile working area by filtering the air; it sterilises nothing. The genuine methods are dry heat (a hot air oven, for glassware), autoclaving (steam under pressure, the most reliable), and filtration through a 0.22 μm membrane, which is how heat-sensitive media and sera are sterilised.
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