55. Sterilization is defined as a process of freeing living microorganisms from a surface, medium or an article using physical and chemical agents. Physical agents: Radiations (ionizing and non-ionizing), filters, steam, higher temperature, pasteurization The ionizing radiations are more penetrating as compared to UV radiation Therefore, the correct option is B. Solution 55. Sterilization is defined as a process of freeing living microorganisms from a surface, medium or an article using physical and chemical agents. Physical agents: Radiations (ionizing and non-ionizing), filters, steam, higher temperature, pasteurization The ionizing radiations are more penetrating as compared to UV radiation Therefore, the correct option is B..