Which row gives the correct comparison between microwaves and ultraviolet?
- Afrequency of microwaves compared to ultraviolet: higher; microwaves are used to heat water and ultraviolet is used to sterilise water
- Bfrequency of microwaves compared to ultraviolet: higher; microwaves are used to sterilise water and ultraviolet is used to heat water
- Cfrequency of microwaves compared to ultraviolet: lower; microwaves are used to heat water and ultraviolet is used to sterilise water
- Dfrequency of microwaves compared to ultraviolet: lower; microwaves are used to sterilise water and ultraviolet is used to heat water