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: ENT
[{'content': 'To prevent synechiae formation after nasal surgery, which one of the following packings is the most useful - \nSelect and explain. \nA. Mitomycin, B. Ribbon gauze, C. Ribbon gauze with liquid paraffin, D. Ribbon gauze steroids', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Now, Mitomycin is being increasingly used for this purpose and is proving more useful.\nMitomycin is an anticancer agent that has shown to decrease scar formation after E.N.T. surgery.\nIt is an anti fibroblastic agent and thus prevents the wound healing and subsequent synechiae formation.\nIt is useful in preventing synechiae formation in following operations :-\n\n\nDCR\nSinus surgery', 'role': 'assistant'}]