<prompt> Out of the following the true statement regarding sterilization is -Dry heat is the best method of sterilization of liquid paraffinAll glass wares are best sterilized by boiling at 100o CBacterial vaccines are best sterilized by ethylene oxidePasteurization of milk by flash method is done by heating at 63degree C for 30 minutes.  <response>: Option 1 Liquid paraffin is sterilized by Hot air oven dry heat. Option 2 Glass ware like test tube, pipette, flask and glass syringes. Fixed oil glycerin, liquid paraffin, propylene glycol and zinc oxide etc. sterilized by Hot air oven dry heat. Option 3 Filtration Membrane filters is an excellent way to remove the microbial population in solutions of heat-labile materials like vaccine, antibiotics, toxin, serum and sugar solution as well as for purification of air in laminar air flow systems. Option 4 Pasteurization is an example of sterilization at a temperature 100degC. Methods: 63degC for 30 min Holder method and 72degC for 15-20 sec Flash method followed by rapid cooling to 13degC 