This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Pathological changes occur in dengue haemorrhagic  Fever ( DHF): \nSelect and explain. \nA. Focal haemorrhages and congestion., B. Coagulopathy with thrombocytopenia., C. Haemoconcentration., D. All of the above.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: PATHOLOGIC CHANGES The predominant organ\xa0Changes in DHF are due to:\n\nFocal haemorrhages and congestion;\nIncreased vascular permeability resulting in\xa0oedema in different organs;\nCoagulopathy with thrombocytopenia; and\nHaemoconcentration.', 'role': 'assistant'}]