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: Medicine
[{'content': 'All are impoant medical measures to treat radiation proctitis , EXCEPT: \nSelect and explain. \nA. Formalin application, B. Topical sucralfate, C. 5-Aminosalicylic acid enema, D. Azathioprine enema', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Treatment for chronic radiation proctitis : Usually unsatisfactory. Formalin application Topical sucralfate with oral metronidazole 5-amino salicylic acid enemas sho chain fatty acids Antioxidants such as vitamin E and pentoxifylline Hyperbaric oxygen Ref:World J Gastroenterol 2011 November 7; 17(41): 4554-4562.', 'role': 'assistant'}]