This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ohopaedics Q Bank, Subject name: Orthopaedics
[{'content': 'Regarding negative pressure wound therapy, false statement is: \nSelect and explain. \nA. Necrotic tissue with eschar in wound is a contraindication to its use, B. Pressure is 30 mmHg, C. Gives good granulation tissue, D. Used intermittently or continuously', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Negative pressure wound therapy: Enhances wound healing by the removal of fluid collecting in it. Suction pressure -75 to -125 mmHg Gives good granulation tissue Can be used intermittently or continuously Contraindications: Malignancy, Untreated osteomyelitis, Necrotic eschar', 'role': 'assistant'}]