This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thermal injury, Subject name: Forensic Medicine
Prolonged exposure of extremities to cold sea water or cold trenches for many hours produces a condition called 
Select and explain. 
A. Frost bite, B. Immersion foot, C. Hypothermia, D. Scalds
B: Immersion foot
Answer: B: Immersion foot 
Explanation: Prolonged exposure of extremities to cold sea water or cold trenches for many hours produce a condition known as trench foot or immersion foot as may be seen in shipwreck survivors or soldiers. Ref: TEXTBOOK OF FORENSIC MEDICINE AND TOXICOLOGY KRISHNAN VIJ FIFTH EDITION PAGE 172