Which one of the following is a common radiation used to create aseptic conditions in HEPA laminar air flow chamber?

Correct option is A

Correct option: (a) Ultraviolet rays
· UV-C (254 nm) lamps are installed in laminar flow cabinets to sterilize the work area before use.
Other options:
· (b) Gamma rays – Used for deep sterilization (food, instruments), not for laminar flow.
· (c) β-rays – Not used for sterilizing work surfaces.
· (d) X-rays – Not used in HEPA chambers.