Which molecule has a tetrahedral arrangement of electron pairs but is not a tetrahedral molecule?

The answer is probably c. xylem

They are all solids.

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.