This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sterilization and Disinfection, Subject name: Microbiology
Method of choice for sterilization of liquid paraffin: 
Select and explain. 
A. Flaming, B. Moist heat, C. Autoclave, D. Hot air oven
D: Hot air oven
Answer: D: Hot air oven 
Explanation: Ans. (d) Hot air ovenRef.: Microbiology by Anattthanarayan and Paniker 8th ed. / 31* Flaming: in this method the articles should be sterilized on the hot flame of Bunsen burner.* Hot air oven: It is also called dry heat sterilizer. The articles should be sterilized at the temperature 150degC-170degC for 1 hour.# Glass ware like test tube, pipette, flask and glass syringes, fixed oil glycerin, liquid paraffin, propylene glycol and zinc oxide etc. can be sterilized by this method.* Auto clave: this type of sterilization is done by steam heat under pressure.* Use: Glass ware, surgical dressing, rubber, gloves, surgical instrument are sterilized by this method(Autoclaved)