This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Sterilization of liquid paraffin is done by: 
Select and explain. 
A. Autoclaving, B. Hot air oven, C. UV radiation, D. Inspissation
B: Hot air oven
Answer: B: Hot air oven 
Explanation: Key Points 
Hot air oven is used in laboratories and clinics for heat-resistant items that are not sterilized well by moist heat. They are used for sterilization of: 

Glasswares (syringes, Petri dishes, flasks, pipettes, test tubes, etc.)
Surgical instruments (scalpels, scissors, forceps, etc.)
Chemicals (liquid paraffin, sulfonamide powders, etc.)
Oils that are not penetrated well by steam used in moist heat sterilization. 

Parija SC. Textbook of Microbiology & Immunology. Elsevier Health Sciences; 2014. Page:27