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: Anaesthesia
[{'content': 'Subarachnoid block as anaesthesia is contraindicated in – \nSelect and explain. \nA. Diabetic gangrene, B. Burgers disease, C. Atherosclerotic gangrene, D. Hemophilia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Coagulopathy or bleeding disorders are absolute contraindications.', 'role': 'assistant'}]