The table compares the frequency of some unknown electromagnetic waves.
Comparison of Frequency
Electromagnetic Wave Frequency (hertz)
W 10^14m
X 10^10m
Y 10^20m
Z 10^6m
Which electromagnetic wave has the longest wavelength?
Wave W
Wave X
Wave Y
Wave Z

The answer is probably c. xylem

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.