Example of cold burn is /are:: (A) Frostbite, (B) Trench foot in soldiers., (C) Immersion foot occurring in shipwrecked persons., (D) All of the above.
Answer is D. Cold burns include

Freezing injuries (frostbite)
Non-freezing cold injuries e.g. chilblain (localized painful erythema in the fingers, toes or ears produced by cold damp weather)
Trench foot seen in soldiers
Immersion foot occurring in shipwrecked persons.