This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Plastic & Reconstructive Surgery, Subject name: Surgery
Bedsore is an example of: 
Select and explain. 
A. Tropical ulcer, B. Trophic ulcer, C. Venous ulcer, D. Post thrombotic ulcer
B: Trophic ulcer
Answer: B: Trophic ulcer 
Explanation: Ans. (b) Trophic ulcer* Bedsore is a pressure ulcer. Most common in sacrum site due to persistent pressure in the back.* This is a type of trophic ulcer.* This can be prevented by frequent change of positioning of the bedridden patient and using Water/Aqua bed.* Once bedsore is formed it is difficult to treat.* Treatment extends from local wound debridement to flap procedures.